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  1. Article ; Online: Featuring long-lifetime deep-red emitting iridium

    Silva, Renan C / Canisares, Felipe S M / Saraiva, Leonardo F / Pires, Ana M / Lima, Sergio A M

    Dalton transactions (Cambridge, England : 2003)

    2024  Volume 53, Issue 12, Page(s) 5466–5477

    Abstract: The significant attention drawn to ... ...

    Abstract The significant attention drawn to Ir
    Language English
    Publishing date 2024-03-19
    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/d3dt02531d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: PMMA or PVDF films blended with β-diketonate tetrakis Eu

    Beltrame, Ariane C F / Bispo-Jr, Airton G / Canisares, Felipe S M / Fernandes, Ricardo V / Laureto, Edson / Lima, Sergio A M / Pires, Ana M

    Soft matter

    2023  Volume 19, Issue 22, Page(s) 3992–4000

    Abstract: Luminescent ... ...

    Abstract Luminescent Ln
    Language English
    Publishing date 2023-06-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 2191476-X
    ISSN 1744-6848 ; 1744-683X
    ISSN (online) 1744-6848
    ISSN 1744-683X
    DOI 10.1039/d3sm00239j
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Red-emitting heteroleptic iridium(III) complexes: photophysical and cell labeling study.

    Canisares, Felipe S M / Mutti, Alessandra M G / Santana, Edy F / Oliveira, Vytor C / Cavalcante, Dalita G S M / Job, Aldo E / Pires, Ana M / Lima, Sergio A M

    Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology

    2022  Volume 21, Issue 6, Page(s) 1077–1090

    Abstract: Two red-emitting heteroleptic iridium(III) complexes (Ir-p and Ir-q) were synthesized and their photophysical and biological properties were analyzed. After their structures have been confirmed by several techniques, such ... ...

    Abstract Two red-emitting heteroleptic iridium(III) complexes (Ir-p and Ir-q) were synthesized and their photophysical and biological properties were analyzed. After their structures have been confirmed by several techniques, such as
    MeSH term(s) Iridium/chemistry ; Luminescence ; Molecular Structure ; Organometallic Compounds/chemistry ; Spectroscopy, Fourier Transform Infrared
    Chemical Substances Organometallic Compounds ; Iridium (44448S9773)
    Language English
    Publishing date 2022-03-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 2072584-X
    ISSN 1474-9092 ; 1474-905X
    ISSN (online) 1474-9092
    ISSN 1474-905X
    DOI 10.1007/s43630-022-00200-8
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  4. Article: Red-Emitting Hybrid Based on Eu

    Santos, João A O / Mutti, Alessandra M G / Bispo-Jr, Airton G / Pires, Ana M / Lima, Sergio A M

    Materials (Basel, Switzerland)

    2020  Volume 13, Issue 23

    Abstract: Luminescent organic-inorganic hybrids containing lanthanides ( ... ...

    Abstract Luminescent organic-inorganic hybrids containing lanthanides (Ln
    Language English
    Publishing date 2020-12-02
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma13235494
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  5. Article: Red phosphor based on Eu3+-isoelectronically doped Ba2SiO4 obtained via sol–gel route for solid state lightning

    Bispo, Airton G / Ceccato, Diego A / Lima, Sergio A. M / Pires, Ana. M

    RSC advances. 2017 Nov. 21, v. 7, no. 85

    2017  

    Abstract: The present paper reports on the effect of Eu3+ concentration (1–5%, considering a charge compensation mechanism) on the structural, morphological and spectroscopic properties of Ba2SiO4 produced by using a novel approach that involves an adapted sol–gel ...

    Abstract The present paper reports on the effect of Eu3+ concentration (1–5%, considering a charge compensation mechanism) on the structural, morphological and spectroscopic properties of Ba2SiO4 produced by using a novel approach that involves an adapted sol–gel route. XRD data showed that high crystalline and single phase doped Ba2SiO4 samples were prepared at lower calcination temperature (1100 °C) compared to the standard solid-state method (∼1300 °C). FTIR, Raman and DRS analyses indicated that the Ba2+ replacement by Eu3+ ions causes punctual structural defects in the Ba2SiO4 lattice, which particles observed by SEM imaging have irregular shape characteristics for the use of the acid-catalyzed sol–gel method. Optical bandgap values evaluated by DRS measurements of the red phosphors are smaller (∼4.5 eV) than that of the nominally pure matrix (∼5.8 eV), evidencing that Eu3+ ions increase Ba2SiO4 structural/electronic defects. The detailed analysis of the f–f Eu3+ narrow transitions in the photoluminescence spectra showed that doping ions occupy at least two non-equivalent sites without an inversion center in the Ba2SiO4 host. Moreover, the 5% doped sample also exhibited a third Eu3+ anomalous site assigned to the Eu3+–O2− associates, which has a spectral behavior distinct from Eu3+ occupying ordinary host lattice sites. Finally, the 4%-doped sample exhibited the highest relative emission intensity while the 5%-doped, the highest quantum efficiency (72.6%) which qualifies these materials as potential candidates to be used as red phosphors for solid state lightning.
    Keywords Fourier transform infrared spectroscopy ; Raman spectroscopy ; X-ray diffraction ; barium ; emissions factor ; europium ; image analysis ; ions ; lightning ; photoluminescence ; scanning electron microscopy ; sol-gel processing ; spectral analysis ; temperature
    Language English
    Dates of publication 2017-1121
    Size p. 53752-53762.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c7ra10494d
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Eu

    Leite Silva, Camila M B / Bispo-Jr, Airton G / Canisares, Felipe S M / Castilho, Shirley A / Lima, Sergio A M / Pires, Ana M

    Luminescence : the journal of biological and chemical luminescence

    2019  Volume 34, Issue 8, Page(s) 877–886

    Abstract: ... ...

    Abstract Eu
    MeSH term(s) Coordination Complexes/chemical synthesis ; Coordination Complexes/chemistry ; Europium/chemistry ; Ketones/chemistry ; Light ; Luminescent Measurements ; Molecular Structure
    Chemical Substances Coordination Complexes ; Ketones ; Europium (444W947O8O)
    Language English
    Publishing date 2019-07-25
    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.3686
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 2962: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  7. Article: Study on the structural and electrocatalytic properties of Ba2+- and Eu3+-doped silica xerogels as sensory platforms

    Raymundo-Pereira, Paulo A / Ceccato, Diego A / Junior, Airton G. B / Teixeira, Marcos F. S / Lima, Sergio A. M / Pires, Ana. M

    RSC advances. 2016 Nov. 01, v. 6, no. 106

    2016  

    Abstract: This work reports on the sol–gel synthesis of barium- and europium-doped silica xerogel and its use as an electrocatalytic sensor. Barium was chosen to assist the network framing and europium to provide electronic properties, including the Eu2+/Eu3+ ... ...

    Abstract This work reports on the sol–gel synthesis of barium- and europium-doped silica xerogel and its use as an electrocatalytic sensor. Barium was chosen to assist the network framing and europium to provide electronic properties, including the Eu2+/Eu3+ redox process. The results from different molecular and structural techniques indicated that this xerogel is a composite material that combines a non-crystalline polymeric silica network with a high level of agglomeration and a low degree of reticulation formed by the hydrolysis and condensation of TEOS and M–O bonds (M = Ba2+ and/or Eu3+), whereas the oxygen atoms belong to the xerogel phase. The electrochemical behavior of the silica xerogel:Ba2+,Eu3+ with different amounts of Eu3+ under several different conditions was investigated. The electrochemical sensing platform showed a well-defined redox coupling with a formal potential of 0.06 V, assigned to europium redox sites in silicate. Electrocatalytic activity was observed with an increasing anodic peak current to the isoniazid oxidation, indicating that the electrochemical sensing platform designed here was successfully achieved.
    Keywords barium ; chemical bonding ; composite materials ; electrochemistry ; europium ; hydrolysis ; isoniazid ; oxidation ; oxygen ; polymers ; silica ; silicates ; xerogels
    Language English
    Dates of publication 2016-1101
    Size p. 104529-104536.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c6ra22508j
    Database NAL-Catalogue (AGRICOLA)

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