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  1. Article ; Online: AIE or AIE(P)E-active transition metal complexes for highly sensitive detection of nitroaromatic explosives

    Arumugam Ramdass / Veerasamy Sathish / Pounraj Thanasekaran

    Results in Chemistry, Vol 4, Iss , Pp 100337- (2022)

    2022  

    Abstract: Nitroaromatic compounds (NACs) that are components of explosives have become seriously endanger human health, environmental cleaning, national homeland security, etc. The development of appropriate probes for the detection of NACs with desired easy ... ...

    Abstract Nitroaromatic compounds (NACs) that are components of explosives have become seriously endanger human health, environmental cleaning, national homeland security, etc. The development of appropriate probes for the detection of NACs with desired easy operability, rapid response, reusability and high sensitivity and selectivity advantages has remained a great challenge. Over the past few years, great efforts have been made toward the development of advanced functional materials based on aggregation-induced emission or aggregation induced emission (phosphorescence) enhancement (AIE or AIE(P)E)-active transition metal complexes(AIEgens)and their remarkable achievements in the detection of NACs due to their high quantum yield and tunable photophysical properties. In this review, a brief description of luminescent AIEgens is presented, accompanied by a study on the Ir(III), Re(I) and Pt(II)-based AIEgens as sensing materials for nitroexplosives detection. Then, the trends and challenges of AIE or AIE(P)E-active transition metal complexes for the sensitive and selective detection of nitroaromatic explosives are also discussed.
    Keywords Aggregation induced emission ; Nanoaggregates ; Nitroaromatics ; Sensitivity ; Transition metal complexes ; Chemistry ; QD1-999
    Subject code 540
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Selective anions mediated fluorescence "turn-on", aggregation induced emission (AIE) and lysozyme targeting properties of pyrene-naphthalene sulphonyl conjugate.

    Krishnaveni, Kumar / Gurusamy, Shunmugasundaram / Sathish, Veerasamy / Thanasekaran, Pounraj / Mathavan, Alagarsamy

    Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

    2021  Volume 252, Page(s) 119537

    Abstract: We have designed and synthesized a novel pyrene-naphthalene sulphonyl conjugate, 1-((1Z)-(4-((Z)-4-(pyrene-1-yl)methyleneamino)phenylsulfonyl)phenylimino)methyl)naphthalene-2-ol (PSN) through a facile two-step reactions. It was characterized by various ... ...

    Abstract We have designed and synthesized a novel pyrene-naphthalene sulphonyl conjugate, 1-((1Z)-(4-((Z)-4-(pyrene-1-yl)methyleneamino)phenylsulfonyl)phenylimino)methyl)naphthalene-2-ol (PSN) through a facile two-step reactions. It was characterized by various spectral techniques. Fluorescence spectral studies showed that compound PSN featured fluorescence enhancement upon increasing the water content in THF. This can be attributed to the phenomena of aggregated induced emission (AIE), which is confirmed by SEM and AFM studies, due to the restriction of CHN isomerization of PSN. The anion sensing of PSN was examined with various anions. Among these anions, H
    MeSH term(s) Anions ; Muramidase ; Naphthalenes ; Pyrenes ; Spectrometry, Fluorescence
    Chemical Substances Anions ; Naphthalenes ; Pyrenes ; Muramidase (EC 3.2.1.17)
    Language English
    Publishing date 2021-02-03
    Publishing country England
    Document type Journal Article
    ZDB-ID 210413-1
    ISSN 1873-3557 ; 0370-8322 ; 0584-8539 ; 1386-1425
    ISSN (online) 1873-3557
    ISSN 0370-8322 ; 0584-8539 ; 1386-1425
    DOI 10.1016/j.saa.2021.119537
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Aggregation-induced emission enhancement (AIEE) of tetrarhenium(I) metallacycles and their application as luminescent sensors for nitroaromatics and antibiotics.

    Nurnabi, Mohammad / Gurusamy, Shunmugasundaram / Wu, Jing-Yun / Lee, Chung-Chou / Sathiyendiran, Malaichamy / Huang, Sheng-Ming / Chang, Che-Hao / Chao, Ito / Lee, Gene-Hsiang / Peng, Shie-Ming / Sathish, Veerasamy / Thanasekaran, Pounraj / Lu, Kuang-Lieh

    Dalton transactions (Cambridge, England : 2003)

    2023  Volume 52, Issue 7, Page(s) 1939–1949

    Abstract: The self-assembly of tetrarhenium metallacycles [{Re(CO) ...

    Abstract The self-assembly of tetrarhenium metallacycles [{Re(CO)
    Language English
    Publishing date 2023-02-14
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d2dt03408e
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  4. Article ; Online: Advances of Inorganic Materials in the Detection and Therapeutic Uses against Coronaviruses.

    Sathish, Veerasamy / Manivannan, Chandrakumar / Balasubramaniyan, Malathi / Kumar, Arumugam Ramesh / Thanasekaran, Pounraj

    Current medicinal chemistry

    2021  Volume 28, Issue 26, Page(s) 5311–5327

    Abstract: Coronaviruses (CoVs) are enveloped viruses with particle-like characteristics and a diameter of 60-140 nm, positively charged, and single-stranded RNA genomes, which caused a major outbreak of human fatal pneumonia in the beginning of the 21st century. ... ...

    Abstract Coronaviruses (CoVs) are enveloped viruses with particle-like characteristics and a diameter of 60-140 nm, positively charged, and single-stranded RNA genomes, which caused a major outbreak of human fatal pneumonia in the beginning of the 21st century. COVID-19 is currently considered a continuous potential pandemic threat across the globe. Therefore, considerable efforts have been made to develop innovative methods and technologies for suppressing the spread of viruses as well as inactivating the viruses but COVID-19 vaccines are still in the development phase. This perspective focuses on the sensing, detection and therapeutic applications of CoVs using inorganic- based nanomaterials, metal complexes, and metal-conjugates. Synthetic inorganic- based nanoparticles interact strongly with proteins of viruses due to their morphological similarities, and therefore, numerous antivirals have been tested for efficacy against different viruses in vitro through colorimetric and electrochemical assays. Metal complexes- based agents such as bismuth complexes form an attractive class of drugs with a number of therapeutic applications, including the inhibition and duplex-unwinding activity of SARS-CoV helicase by quantitative real-time PCR (Q-RT-PCR), phosphate release assay and radioassay studies. Metal-conjugates show major effects on inhibiting the 3Clike protease of SARS-CoV and the replication of RNA-dependent RNA polymerase (RdRp). We anticipate that these approaches will provide rapid and accurate antiviral strategies in the development of these innovative sensors for the detection, inhibition and antiviral activities of coronaviruses.
    MeSH term(s) Antiviral Agents/pharmacology ; Antiviral Agents/therapeutic use ; COVID-19 ; COVID-19 Vaccines ; Humans ; Pandemics ; SARS-CoV-2
    Chemical Substances Antiviral Agents ; COVID-19 Vaccines
    Language English
    Publishing date 2021-02-10
    Publishing country United Arab Emirates
    Document type Journal Article
    ZDB-ID 1319315-6
    ISSN 1875-533X ; 0929-8673
    ISSN (online) 1875-533X
    ISSN 0929-8673
    DOI 10.2174/0929867328666210219142208
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Host-guest interaction studies of polycyclic aromatic hydrocarbons (PAHs) in alkoxy bridged binuclear rhenium (I) complexes.

    Sathish, Veerasamy / Krishnan, Mani Murali / Velayudham, Murugesan / Thanasekaran, Pounraj / Lu, Kuang-Lieh / Rajagopal, Seenivasan

    Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

    2019  Volume 222, Page(s) 117160

    Abstract: The interaction of two neutral alkoxy bridged binuclear rhenium(I) complexes, 1 and 2 [{Re(CO) ...

    Abstract The interaction of two neutral alkoxy bridged binuclear rhenium(I) complexes, 1 and 2 [{Re(CO)
    Language English
    Publishing date 2019-05-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 210413-1
    ISSN 1873-3557 ; 0370-8322 ; 0584-8539 ; 1386-1425
    ISSN (online) 1873-3557
    ISSN 0370-8322 ; 0584-8539 ; 1386-1425
    DOI 10.1016/j.saa.2019.117160
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  6. Article ; Online: Synthesis and Photophysical Properties of Rhenium(I)-Alkynyl Molecular Rectangles

    Arumugam Ramdass / Veerasamy Sathish / Bala Manimaran / Pounraj Thanasekaran / Seenivasan Rajagopal

    Oriental Journal of Chemistry, Vol 32, Iss 4, Pp 1859-

    2016  Volume 1873

    Abstract: A series of highly conjugated, rigid Re(I)-based molecular rectangles {[fac-Re(CO)3Br]2(μ-bpy)(μ-L)}2 (1, L = 1,4-bis(4′-pyridylethynyl)benzene, bpeb; 2, L = 1,4-bis(4′-pyridylethynyl)naphthalene, bpen; 3, L = 1,4-bis(4′-pyridylethynyl)anthracene, bpea; ... ...

    Abstract A series of highly conjugated, rigid Re(I)-based molecular rectangles {[fac-Re(CO)3Br]2(μ-bpy)(μ-L)}2 (1, L = 1,4-bis(4′-pyridylethynyl)benzene, bpeb; 2, L = 1,4-bis(4′-pyridylethynyl)naphthalene, bpen; 3, L = 1,4-bis(4′-pyridylethynyl)anthracene, bpea; and bpy = 4,4′-bipyridine) containing two different types of pyridyl ligands were synthesized, characterized and their photophysical properties studied. Successful emission color tuning was achieved by incorporating rigid alkynyl ligands into the Re(I) rectangles. Complexes 1-3 exhibited an intense absorption bands with a high e value at > 340 nm in THF solution, which is attributed to mixed two metal-to-ligand charge transfer dπ(Re) → π*(bpy) and dπ(Re) → π*(alkynyl)) along with ligand-to-ligand charge transfer (1LLCT)/ and intraligand charge transfer (1ILCT) transitions. Compound 1 featured a broad and structureless emission band at 619 nm, which was attributed to the emission of 3MLCT dπ(Re) → π*(bpy) and/or [dπ(Re) → π*(alkynyl)] characteristics with an additional luminescence at 431 nm. Whereas complexes 2 and 3 displayed an intraligand (IL) emission at 445 and 489(sh), 521 nm. These compounds represent a new class of visible light-harvesting materials that exhibit greatly enhanced emission decay lifetimes as a result of intervening ligand triplet states (3LLCT/3ILCT) present on the alkynyl appended naphthalene and anthracene chromophores, as evidenced by transient absorption spectra.
    Keywords Rectangles ; alkynyl ligands ; luminescence ; quenching; rhenium ; quenching ; rhenium ; Chemistry ; QD1-999 ; Science ; Q
    Language English
    Publishing date 2016-08-01T00:00:00Z
    Publisher Oriental Scientific Publishing
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Development of luminescent sensors based on transition metal complexes for the detection of nitroexplosives.

    Sathish, Veerasamy / Ramdass, Arumugam / Velayudham, Murugesan / Lu, Kuang-Lieh / Thanasekaran, Pounraj / Rajagopal, Seenivasan

    Dalton transactions (Cambridge, England : 2003)

    2017  Volume 46, Issue 48, Page(s) 16738–16769

    Abstract: The detection of chemical explosives is a major area of research interest and is essential for the military as well as homeland security to counter the catastrophic effects of global terrorism. In recent years, tremendous effort has been devoted to the ... ...

    Abstract The detection of chemical explosives is a major area of research interest and is essential for the military as well as homeland security to counter the catastrophic effects of global terrorism. In recent years, tremendous effort has been devoted to the development of luminescent materials for the detection of explosives in the vapor, solution, and solid states with a high degree of selectivity and sensitivity and a rapid response time. Apart from the wide range of organic fluorescent chemosensors, transition metal complexes play a prominent role in the sensing of nitroaromatic explosives owing to their rich photophysical characteristics. This review briefly summarizes the salient features of the design and preparation of transition metal (Zn(ii), Ir(iii), Pd(ii), Pt(ii), Re(i) and Ru(ii)) complexes/metallacycles/metallosupramolecules with emphasis on their photophysical properties, sensing behavior, mechanism of action, and the driving forces for detecting explosives and future prospects and challenges. Most of the probes that have been reported to date act as "turn-off" luminescent sensors because their emission (intensity, lifetime, and quantum yield) is eventually quenched upon sensing with nitroaromatic compounds (NACs) through photo-induced electron or energy transfer. These unique properties of transition metal complexes in response to explosives open up new vistas for the development of real world applications such as on-site detection, in-field security, forensic research, etc.
    MeSH term(s) Coordination Complexes/chemistry ; Explosive Agents/analysis ; Explosive Agents/chemistry ; Luminescent Measurements/instrumentation ; Nitro Compounds/analysis ; Nitro Compounds/chemistry ; Transition Elements/chemistry
    Chemical Substances Coordination Complexes ; Explosive Agents ; Nitro Compounds ; Transition Elements
    Language English
    Publishing date 2017-12-12
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/c7dt02790g
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  8. Article ; Online: Aggregation induced emission enhancement (AIEE) characteristics of quinoline based compound - A versatile fluorescent probe for pH, Fe(III) ion, BSA binding and optical cell imaging.

    Manikandan, Irulappan / Chang, Chien-Huei / Chen, Chia-Ling / Sathish, Veerasamy / Li, Wen-Shan / Malathi, Mahalingam

    Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

    2017  Volume 182, Page(s) 58–66

    Abstract: Novel benzimidazoquinoline derivative (AVT) was synthesized through a substitution reaction and characterized by various spectral techniques. Analyzing the optical properties of AVT under absorption and emission spectral studies in different environments ...

    Abstract Novel benzimidazoquinoline derivative (AVT) was synthesized through a substitution reaction and characterized by various spectral techniques. Analyzing the optical properties of AVT under absorption and emission spectral studies in different environments exclusively with respect to solvents and pH, intriguing characteristics viz. aggregation induced emission enhancement (AIEE) in the THF solvent and 'On-Off' pH sensing were found at neutral pH. Sensing nature of AVT with diverse metal ions and bovine serum albumin (BSA) was also studied. Among the metal ions, Fe
    MeSH term(s) Cell Line, Tumor ; Cytological Techniques/methods ; Ferric Compounds/analysis ; Ferric Compounds/chemistry ; Fluorescence Resonance Energy Transfer/methods ; Fluorescent Dyes/analysis ; Fluorescent Dyes/chemistry ; Fluorescent Dyes/toxicity ; Humans ; Hydrogen-Ion Concentration ; Molecular Probes/analysis ; Molecular Probes/chemistry ; Molecular Probes/toxicity ; Protein Binding ; Quinolines/analysis ; Quinolines/chemistry ; Quinolines/toxicity ; Serum Albumin, Bovine/analysis ; Serum Albumin, Bovine/chemistry ; Spectrophotometry, Ultraviolet
    Chemical Substances Ferric Compounds ; Fluorescent Dyes ; Molecular Probes ; Quinolines ; Serum Albumin, Bovine (27432CM55Q)
    Language English
    Publishing date 2017-07-05
    Publishing country England
    Document type Journal Article
    ZDB-ID 210413-1
    ISSN 1873-3557 ; 0370-8322 ; 0584-8539 ; 1386-1425
    ISSN (online) 1873-3557
    ISSN 0370-8322 ; 0584-8539 ; 1386-1425
    DOI 10.1016/j.saa.2017.03.055
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  9. Article ; Online: Electron transfer reactions of ruthenium(II)-bipyridine complexes carrying tyrosine moiety with quinones.

    Mareeswaran, Paulpandian Muthu / Rajkumar, Eswaran / Sathish, Veerasamy / Rajagopal, Seenivasan

    Luminescence : the journal of biological and chemical luminescence

    2014  Volume 29, Issue 7, Page(s) 754–761

    Abstract: Three ruthenium(II)-bipyridine complexes carrying a tyrosine moiety were synthesized and photophysical and electron transfer studies with quinones were carried out using absorption and emission spectral techniques. The binding efficiency of quinones with ...

    Abstract Three ruthenium(II)-bipyridine complexes carrying a tyrosine moiety were synthesized and photophysical and electron transfer studies with quinones were carried out using absorption and emission spectral techniques. The binding efficiency of quinones with ruthenium(II)-bipyridine complexes was also studied using these techniques. The binding efficiency was moderate and similar for all complexes with all quinones. The quenching modes were also similar and efficient for all complexes with all quinones. The quenching processes were diffusion controlled. The rate of electron transfer was calculated using semiclassical theory.
    MeSH term(s) Electron Transport ; Molecular Structure ; Organometallic Compounds/chemical synthesis ; Organometallic Compounds/chemistry ; Pyridines/chemistry ; Quinones/chemistry ; Ruthenium/chemistry ; Tyrosine/chemistry
    Chemical Substances Organometallic Compounds ; Pyridines ; Quinones ; Tyrosine (42HK56048U) ; Ruthenium (7UI0TKC3U5)
    Language English
    Publishing date 2014-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 1470995-8
    ISSN 1522-7243 ; 1522-7235 ; 1099-1271
    ISSN (online) 1522-7243
    ISSN 1522-7235 ; 1099-1271
    DOI 10.1002/bio.2617
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Aggregation-induced emission enhancement of anthracene-derived Schiff base compounds and their application as a sensor for bovine serum albumin and optical cell imaging.

    Densil, Simon / Chang, Chien-Huei / Chen, Chia-Ling / Mathavan, Alagarsamy / Ramdass, Arumugam / Sathish, Veerasamy / Thanasekaran, Pounraj / Li, Wen-Shan / Rajagopal, Seenivasan

    Luminescence : the journal of biological and chemical luminescence

    2018  Volume 33, Issue 4, Page(s) 780–789

    Abstract: Three anthracene-based Schiff base complexes, R1-R3 (R1 = (E)-N´-((anthracen-10-yl)methylene)benzohydrazide; R2 = (E)-1-((anthracen-10-yl)methylene)-4-phenylsemicarbazide; and R3 = (E)-1-((anthracen-10-yl)methylene)-4-phenylthiosemicarbazide) were ... ...

    Abstract Three anthracene-based Schiff base complexes, R1-R3 (R1 = (E)-N´-((anthracen-10-yl)methylene)benzohydrazide; R2 = (E)-1-((anthracen-10-yl)methylene)-4-phenylsemicarbazide; and R3 = (E)-1-((anthracen-10-yl)methylene)-4-phenylthiosemicarbazide) were synthesized from 9-anthracenecarboxaldehyde, benzohydrazide, 4-phenylsemicarbazide and 4-phenylthiosemi-carbazide respectively, and characterized by various spectral techniques. The absorption spectral characteristics of R1-R3 were bathochromically tuned to the visible region by extending the π conjugation. These target compounds were weakly fluorescent in tetrahydrofuran (THF) solution because of rapid isomerization of the C=N double bond in the excited state. However, the aqueous dispersion of R1-R3 in the THF/water mixture by the gradual addition of water up to 90% resulted in an increase in the fluorescence intensity mainly due to aggregation-induced emission enhancement (AIEE) properties. The formation of nanoaggregates of R1-R3 were confirmed by scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques. The compounds R1-R3 are ideal probes for the fluorescence sensing of bovine serum albumin (BSA) and breast cancer cells by optical cell imaging.
    MeSH term(s) Animals ; Anthracenes/chemistry ; Anthracenes/pharmacology ; Cattle ; Cell Survival/drug effects ; Dose-Response Relationship, Drug ; Fluorescence ; Fluorescent Dyes/chemistry ; Fluorescent Dyes/pharmacology ; Furans/chemistry ; Humans ; Microscopy, Electron, Scanning ; Molecular Structure ; Optical Imaging ; Particle Size ; Protein Aggregates/drug effects ; Schiff Bases/chemistry ; Schiff Bases/pharmacology ; Serum Albumin, Bovine/analysis ; Structure-Activity Relationship ; Surface Properties ; Tumor Cells, Cultured ; Water/chemistry
    Chemical Substances Anthracenes ; Fluorescent Dyes ; Furans ; Protein Aggregates ; Schiff Bases ; Water (059QF0KO0R) ; Serum Albumin, Bovine (27432CM55Q) ; tetrahydrofuran (3N8FZZ6PY4) ; anthracene (EH46A1TLD7)
    Language English
    Publishing date 2018-04-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 1470995-8
    ISSN 1522-7243 ; 1522-7235 ; 1099-1271
    ISSN (online) 1522-7243
    ISSN 1522-7235 ; 1099-1271
    DOI 10.1002/bio.3477
    Database MEDical Literature Analysis and Retrieval System OnLINE

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