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Article ; Online: Heterogeneous V

Kumar, Shashi / Maurya, Sushil K

2023 Volume 88, Issue 13, Page(s) 8690–8702

Abstract: ... a heterogeneous and recyclable catalyst (V ...

Abstract	The hydrogenation of nitro compounds to their corresponding amines is developed using a heterogeneous and recyclable catalyst (V
Language	English
Publishing date	2023-06-27
Publishing country	United States
Document type	Journal Article
ZDB-ID	123490-0
ISSN	1520-6904 ; 0022-3263
ISSN (online)	1520-6904
ISSN	0022-3263
DOI	10.1021/acs.joc.3c00569
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Article ; Online: Electronic Structure Calculations of Static Hyper(Polarizabilities) of Substrate-Supported Group-IV and -V Elemental Monolayers.

Kaur, Sumandeep / Pandey, Ravindra / Karna, Shashi P

ACS omega

2023 Volume 8, Issue 10, Page(s) 9614–9620

Abstract: ... of group-IV (i.e., graphene, silicene, germanene, stanene) and group-V (i.e., phosphorene, arsenene ...

Abstract	The substrate-induced effects on the polarizability (α) and first dipole hyperpolarizability (β) of group-IV (i.e., graphene, silicene, germanene, stanene) and group-V (i.e., phosphorene, arsenene, antimonene, and bismuthene) elemental monolayer nanoflakes are investigated. Density functional theory calculations show that these monolayers are bound with varying degrees of interaction strength with the Ag(111) substrate surface. Calculated dipole moment and β values are zero for the centrosymmetric configurations of the pristine elemental monolayers. On the other hand, substrate-induced changes in the electronic densities at the interface lead to substantially enhanced values of β, making these materials attractive for applications in the next-generation photonic technologies at the nanoscale.
Language	English
Publishing date	2023-02-28
Publishing country	United States
Document type	Journal Article
ISSN	2470-1343
ISSN (online)	2470-1343
DOI	10.1021/acsomega.3c00232
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Article ; Online: A Nationwide, Multicentric Case-Control Study on Vitiligo (MEDEC-V) to Elicit the Magnitude and Correlates.

Sarma, Nilendu / Chakraborty, Sayantani / Poojary, Shital / Shashi Kumar, B M / Gupta, Lalit Kumar / Budamakuntla, Leelavathy / Kumrah, Leishiwon / Das, Suchibrata / Ovhal, Ajay Govindrao / Mandal, Nirmal Kumar / Mukherjee, Shuvankar / Anoop, T V / Thakur, Binod Kumar / Eswari, L / Samson, Joan Felicita / Patel, Krina Bharat / Rajagopalan, Rajesh / Gupta, Sanjeev / Kaur, Tejinder

Indian journal of dermatology

2020 Volume 65, Issue 6, Page(s) 473–482

Abstract: Background: Vitiligo is an acquired, idiopathic, and common depigmentation disorder. The values of various epidemiologic parameters are often doubtful due to the methodological weaknesses of the studies.: Aims: To elicit the magnitude of various ... ...

Abstract	Background: Vitiligo is an acquired, idiopathic, and common depigmentation disorder. The values of various epidemiologic parameters are often doubtful due to the methodological weaknesses of the studies. Aims: To elicit the magnitude of various epidemiological parameters and important correlates of vitiligo. Materials and methods: Every vitiligo patient attending the outpatient department of medical colleges spread over most of the Indian states were examined over a period of 1 year. Various epidemiological and clinical variables were examined and compared with age and sex-matched controls (registered in the Clinical Trial Registry of India CTRI/2017/06/008854). Results: A total of 4,43,275 patients were assessed in 30 medical colleges from 21 Indian states. Institutional prevalence of vitiligo was 0.89% (0.86% in males and 0.93% in females, Conclusion: This is one of the largest studies done on vitiligo in India. The prevalence of vitiligo was found to be 0.89% among hospital attendees. Prevalence of vitiligo was higher among females than in males and prevalence of family history, consanguinity, hypothyroid disorders were higher in vitiligo than among controls.
Language	English
Publishing date	2020-06-17
Publishing country	India
Document type	Journal Article
ZDB-ID	416069-1
ISSN	1998-3611 ; 0019-5154
ISSN (online)	1998-3611
ISSN	0019-5154
DOI	10.4103/ijd.IJD_822_19
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Article ; Online: A Dinuclear Iridium(V,V) Oxo-Bridged Complex Characterized Using a Bulk Electrolysis Technique for Crystallizing Highly Oxidizing Compounds.

Shopov, Dimitar Y / Sharninghausen, Liam S / Sinha, Shashi Bhushan / Mercado, Brandon Q / Balcells, David / Brudvig, Gary W / Crabtree, Robert H

Inorganic chemistry

2018 Volume 57, Issue 9, Page(s) 5684–5691

Abstract: We report a general method for the preparation and crystallization of highly oxidized metal complexes that are difficult to prepare and handle by more conventional means. This method improves typical bulk electrolysis and crystallization conditions for ... ...

Abstract	We report a general method for the preparation and crystallization of highly oxidized metal complexes that are difficult to prepare and handle by more conventional means. This method improves typical bulk electrolysis and crystallization conditions for these reactive species by substituting oxidation-prone organic electrolytes and precipitants with oxidation-resistant compounds. Specifically, we find that CsPF
Language	English
Publishing date	2018-05-07
Publishing country	United States
Document type	Journal Article
ZDB-ID	1484438-2
ISSN	1520-510X ; 0020-1669
ISSN (online)	1520-510X
ISSN	0020-1669
DOI	10.1021/acs.inorgchem.8b00757
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Article ; Online: Immunolocalisation pattern of complex I-V in ageing human retina: Correlation with mitochondrial ultrastructure.

Nag, Tapas Chandra / Wadhwa, Shashi

Mitochondrion

2016 Volume 31, Page(s) 20–32

Abstract: ... of mitochondria (anti-mitochondrial antibody and voltage-dependent anion channel-1) and complex I-V (that mediate ... in photoreceptor cells. Between second and seventh decade of life, strong IR to complex I-V was present in photoreceptors ... complex I) and complex II and V remained unaltered with ageing. Nitrosative stress (evaluated by IR ...

Abstract	Earlier studies reported accumulation of mitochondrial DNA mutations in ageing and age-related macular degeneration. To know about the mitochondrial status with age, we examined immunoreactivity (IR) to markers of mitochondria (anti-mitochondrial antibody and voltage-dependent anion channel-1) and complex I-V (that mediate oxidative phosphorylation, OXPHOS) in donor human retinas (age: 19-94years; N=26; right eyes). In all samples, at all ages, IR to anti-mitochondrial antibody and voltage-dependent anion channel-1 was prominent in photoreceptor cells. Between second and seventh decade of life, strong IR to complex I-V was present in photoreceptors over macular to peripheral retina. With progressive ageing, the photoreceptors showed a decrease in complex I-IR (subunit NDUFB4) at eighth decade, and a weak or absence of IR in 10 retinas between ninth and tenth decade. Patchy IR to complex III and complex IV was detected at different ages. IR to ND1 (complex I) and complex II and V remained unaltered with ageing. Nitrosative stress (evaluated by IR to a nitro-tyrosine antibody) was found in photoreceptors. Superoxide dismutase-2 was found upregulated in photoreceptors with ageing. Mitochondrial ultrastructure was examined in two young retinas with intact complex IR and six aged retinas whose counterparts showed weak to absence of IR. Observations revealed irregular, photoreceptor inner segment mitochondria in aged maculae and mid-peripheral retina between eighth and ninth decade; many cones possessed autophagosomes with damaged mitochondria, indicating age-related alterations. A trend in age-dependent reduction of complex I-IR was evident in aged photoreceptors, whereas patchy complex IV-IR (subunits I and II) was age-independent, suggesting that the former is prone to damage with ageing perhaps due to oxidative stress. These changes in OXPHOS system may influence the energy budget of human photoreceptors, affecting their viability.
MeSH term(s)	Adult ; Aged ; Aged, 80 and over ; Aging ; Electron Transport Chain Complex Proteins/analysis ; Female ; Humans ; Male ; Middle Aged ; Mitochondria/chemistry ; Mitochondria/ultrastructure ; Photoreceptor Cells/chemistry ; Retina/chemistry ; Young Adult
Chemical Substances	Electron Transport Chain Complex Proteins
Language	English
Publishing date	2016-11
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	2056923-3
ISSN	1872-8278 ; 1567-7249
ISSN (online)	1872-8278
ISSN	1567-7249
DOI	10.1016/j.mito.2016.08.016
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Atomically thin group v elemental films: theoretical investigations of antimonene allotropes.

Wang, Gaoxue / Pandey, Ravindra / Karna, Shashi P

ACS applied materials & interfaces

2015 Volume 7, Issue 21, Page(s) 11490–11496

Abstract: Group V elemental monolayers including phosphorene are emerging as promising 2D materials ...

Abstract	Group V elemental monolayers including phosphorene are emerging as promising 2D materials with semiconducting electronic properties. Here, we present the results of first-principles calculations on stability, mechanical and electronic properties of 2D antimony (Sb), antimonene. Our calculations show that free-standing α and β allotropes of antimonene are stable and semiconducting. The α-Sb has a puckered structure with two atomic sublayers and β-Sb has a buckled hexagonal lattice. The calculated Raman spectra and STM images have distinct features thus facilitating characterization of both allotropes. The β-Sb has nearly isotropic mechanical properties, whereas α-Sb shows strongly anisotropic characteristics. An indirect-direct band gap transition is expected with moderate tensile strains applied to the monolayers, which opens up the possibility of their applications in optoelectronics.
Language	English
Publishing date	2015-06-03
Publishing country	United States
Document type	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
ISSN	1944-8252
ISSN (online)	1944-8252
DOI	10.1021/acsami.5b02441
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Article ; Online: Adsorption of As(V) by boehmite and alumina of different morphologies prepared under hydrothermal conditions.

Dubey, Shashi Prabha / Dwivedi, Amarendra Dhar / Sillanpää, Mika / Lee, Hongshin / Kwon, Young-Nam / Lee, Changha

Chemosphere

2017 Volume 169, Page(s) 99–106

Abstract: ... with identical morphologies, alumina exhibited better uptake of As(V) than boehmite; the As(V) concentration was ... such as reaction time; initial As(V) concentration; solution pH; competing ions (Ca ...

Abstract	Morphology-controlled materials at the micro- and nanoscale levels are of great significance to the design and application of materials. Stable and well-dispersed boehmite and alumina with different morphologies were fabricated under hydrothermal conditions. The nitrate, chloride, and sulfate aluminum salts yielded nanoplate, microspindle, and microsphere morphologies, respectively. Calcination of the prepared boehmite samples yielded alumina samples with retention of the morphologies. In comparisons of samples with identical morphologies, alumina exhibited better uptake of As(V) than boehmite; the As(V) concentration was analyzed by the standard molybdenum blue method. The adsorption capabilities of the morphologically controlled materials are ranked microspindle > microsphere > nanoplate. The impacts of process parameters, such as reaction time; initial As(V) concentration; solution pH; competing ions (Ca
MeSH term(s)	Absorption, Physicochemical ; Adsorption ; Aluminum Hydroxide/chemistry ; Aluminum Oxide/chemistry ; Arsenic/chemistry ; Water Pollutants, Chemical/chemistry ; Water Purification/methods
Chemical Substances	Water Pollutants, Chemical ; Aluminum Hydroxide (5QB0T2IUN0) ; aluminum oxide hydroxide (63957-70-0) ; Aluminum Oxide (LMI26O6933) ; Arsenic (N712M78A8G)
Language	English
Publishing date	2017-02
Publishing country	England
Document type	Journal Article
ZDB-ID	120089-6
ISSN	1879-1298 ; 0045-6535 ; 0366-7111
ISSN (online)	1879-1298
ISSN	0045-6535 ; 0366-7111
DOI	10.1016/j.chemosphere.2016.11.052
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Article ; Online: Synthesis and Characterization of Iridium(V) Coordination Complexes With an N,O-Donor Organic Ligand.

Sharninghausen, Liam S / Sinha, Shashi Bhushan / Shopov, Dimitar Y / Mercado, Brandon Q / Balcells, David / Brudvig, Gary W / Crabtree, Robert H

Angewandte Chemie (International ed. in English)

2017 Volume 56, Issue 42, Page(s) 13047–13051

Abstract: We have prepared and fully characterized two isomers of [ ... ...

Abstract	We have prepared and fully characterized two isomers of [Ir
Language	English
Publishing date	2017-09-06
Publishing country	Germany
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	2011836-3
ISSN	1521-3773 ; 1433-7851
ISSN (online)	1521-3773
ISSN	1433-7851
DOI	10.1002/anie.201707593
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Article: Atomically Thin Group V Elemental Films: Theoretical Investigations of Antimonene Allotropes

Wang, Gaoxue / Karna Shashi P / Pandey Ravindra

ACS Applied Materials & Interfaces. 2015 June 03, v. 7, no. 21

2015

Abstract: Group V elemental monolayers including phosphorene are emerging as promising 2D materials ...

Abstract	Group V elemental monolayers including phosphorene are emerging as promising 2D materials with semiconducting electronic properties. Here, we present the results of first-principles calculations on stability, mechanical and electronic properties of 2D antimony (Sb), antimonene. Our calculations show that free-standing Î± and Î² allotropes of antimonene are stable and semiconducting. The Î±-Sb has a puckered structure with two atomic sublayers and Î²-Sb has a buckled hexagonal lattice. The calculated Raman spectra and STM images have distinct features thus facilitating characterization of both allotropes. The Î²-Sb has nearly isotropic mechanical properties, whereas Î±-Sb shows strongly anisotropic characteristics. An indirectâdirect band gap transition is expected with moderate tensile strains applied to the monolayers, which opens up the possibility of their applications in optoelectronics.
Keywords	antimony ; Raman spectroscopy ; tensile strength
Language	English
Dates of publication	2015-0603
Size	p. 11490-11496.
Publishing place	American Chemical Society
Document type	Article
ISSN	1944-8252
DOI	10.1021%2Facsami.5b02441
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Article ; Online: Redox Activity of Oxo-Bridged Iridium Dimers in an N,O-Donor Environment: Characterization of Remarkably Stable Ir(IV,V) Complexes.

Sinha, Shashi Bhushan / Shopov, Dimitar Y / Sharninghausen, Liam S / Stein, Christopher J / Mercado, Brandon Q / Balcells, David / Pedersen, Thomas Bondo / Reiher, Markus / Brudvig, Gary W / Crabtree, Robert H

Journal of the American Chemical Society

2017 Volume 139, Issue 28, Page(s) 9672–9683

Abstract: ... dimers results in the formation of fully characterized Ir(IV,V) and Ir(III,III) complexes. The Ir(IV,V ... modest reduction potential of 0.99 V vs NHE is in part attributed to complete charge delocalization ... elusive catalyst. Additionally, a highly reactive material, proposed to be a Ir(V,V) μ-oxo species, is ...

Abstract	Chemical and electrochemical oxidation or reduction of our recently reported Ir(IV,IV) mono-μ-oxo dimers results in the formation of fully characterized Ir(IV,V) and Ir(III,III) complexes. The Ir(IV,V) dimers are unprecedented and exhibit remarkable stability under ambient conditions. This stability and modest reduction potential of 0.99 V vs NHE is in part attributed to complete charge delocalization across both Ir centers. Trends in crystallographic bond lengths and angles shed light on the structural changes accompanying oxidation and reduction. The similarity of these mono-μ-oxo dimers to our Ir "blue solution" water-oxidation catalyst gives insight into potential reactive intermediates of this structurally elusive catalyst. Additionally, a highly reactive material, proposed to be a Ir(V,V) μ-oxo species, is formed on electrochemical oxidation of the Ir(IV,V) complex in organic solvents at 1.9 V vs NHE. Spectroelectrochemistry shows reversible conversion between the Ir(IV,V) and proposed Ir(V,V) species without any degradation, highlighting the exceptional oxidation resistance of the 2-(2-pyridinyl)-2-propanolate (pyalk) ligand and robustness of these dimers. The Ir(III,III), Ir(IV,IV) and Ir(IV,V) redox states have been computationally studied both with DFT and multiconfigurational calculations. The calculations support the stability of these complexes and provide further insight into their electronic structures.
Language	English
Publishing date	2017-07-19
Publishing country	United States
Document type	Journal Article
ZDB-ID	3155-0
ISSN	1520-5126 ; 0002-7863
ISSN (online)	1520-5126
ISSN	0002-7863
DOI	10.1021/jacs.7b04874
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