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Institution

Indian Association for the Cultivation of Science

EducationKolkata, India
About: Indian Association for the Cultivation of Science is a education organization based out in Kolkata, India. It is known for research contribution in the topics: Excited state & Catalysis. The organization has 3867 authors who have published 10457 publications receiving 220098 citations.
Topics: Excited state, Catalysis, Ligand, Thin film, Band gap


Papers
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Journal ArticleDOI
TL;DR: An overview of the recent advances in the photophysical properties of MNCs is presented and it is revealed that the excited-state dynamics, nonlinear optical properties and aggregation induced emission of metal clusters offer exciting opportunities for potential applications.
Abstract: Photophysics of atomically precise metal nanoclusters (MNCs) is an emerging area of research due to their potential applications in optoelectronics, photovoltaics, sensing, bio-imaging and catalysis. An overview of the recent advances in the photophysical properties of MNCs is presented in this review. To begin with, we illustrate general synthesis methodologies of MNCs using direct reduction, chemical etching, ligand exchange, metal exchange and intercluster reaction. Due to strong quantum confinement, the NCs possess unique electronic properties such as discrete optical absorption, intense photoluminescence (PL), molecular-like electron dynamics and non-linear optical behavior. Discussions have also been carried out to unveil the influence of the core size, nature of ligands, heteroatom doping, and surrounding environments on the optical absorption and photophysical properties of metal clusters. Recent findings reveal that the excited-state dynamics, nonlinear optical properties and aggregation induced emission of metal clusters offer exciting opportunities for potential applications. We discuss briefly about their versatile applications in optoelectronics, sensing, catalysis and bio-imaging. Finally, the future perspective of this research field is given.

83 citations

Journal ArticleDOI
TL;DR: In order to study the reactivity pattern of Mo−Ot bonds associated with anionic sulfur ligands, precursor complexes MoO2L·D (H2L = S-methyl 3-(2-hydroxyphenyl)methylenedithiocarbazate; D = CH3OH (1), H2O (2)) were synthesized as discussed by the authors.
Abstract: In order to study the reactivity pattern of Mo−Ot bonds associated with anionic sulfur ligands, precursor complexes MoO2L·D (H2L = S-methyl 3-(2-hydroxyphenyl)methylenedithiocarbazate; D = CH3OH (1), H2O (2)) were synthesized. Complex 2 crystallizes in the orthorhombic space group P212121, with a = 6.079(1) A, b = 11.638(2) A, c = 17.325(2) A, V = 1225.7(4) A3, and Z = 4. In its reaction with PhNHOH, 1 forms a seven-coordinate oxaziridine compound [MoO(η2-ONPh)L·CH3OH] (3) by oxo-rearrangement (elimination−substitution) without a change in the molybdenum oxidation state. The crystal data for 3 are a = 9.573(3) A, b = 9.859(2) A, c = 10.604(3) A, α = 95.90(2)°, β = 95.81(2)°, γ = 112.12(2)°, V = 911.5(4) A3, Z = 2, and triclinic space group P1. In contrast to that of the precursor compound 1 (Mo−Ot = 1.700(4) A), the terminal Mo−Ot distance in 3 (1.668(2) A) is typical of Mo−O bonds of order 3, which drives the formation of an apparently unstable three-membered metallacycle via spectator oxo stabilization...

83 citations

Journal ArticleDOI
TL;DR: The role of different functional groups and cell wall components of Rhizopus oryzae on adsorption of rhodamine B is described and carboxyl and amino groups were identified as most important moieties involved in the binding process.

83 citations

Journal ArticleDOI
TL;DR: In this article, four succinato-bridged complexes of copper(II) have been synthesized and the coligand bpy and phen in these complexes show face-to-face (in 1, 2, 3, 4) or edge-to face (in 4) interactions forming the multidimensional supramolecular architectures.
Abstract: Four succinato-bridged complexes of copper(II) have been synthesized. Complex 1, [Cu2(μ-OH2)2L(bpy)2(NO3)2]n and 2, [Cu2(μ-OH2)2L(phen)2(NO3)2]n (bpy = 2,2′-bipyridine; phen = 1,10-phenanthroline and LH2 = succinic acid) exhibit 1D coordination polymer structures where both the nitrate ions are directly linked to the copper(II) producing synthons in a 2D sheet. A novel 2D grid-like network, {[Cu4L2(bpy)4(H2O)2](ClO4)4(H2O)}n3, is obtained upon changing the nitrate by perchlorate anion in complex 1, where the channels are occupied by the anions. On changing the nitrate by tetrafluoroborate anion in complex 2, a novel octanuclear complex, [Cu8L4(phen)12](BF4)8·8H2O 4, is isolated. The coligand bpy and phen in these complexes show face-to-face (in 1, 2, 3, 4) or edge-to-face (in 4) π–π interactions forming the multidimensional supramolecular architectures. Interestingly, the appearance of edge-to-face π–π interactions in complex 4 facilitates the formation of discrete octanuclear entities. Variable-temperature (300–2 K) magnetic measurements of complexes have been done. Complexes 1 and 2 show very weak antiferromagnetic (OOC–CH2–CH2–COO) and ferromagnetic coupling (μ-H2O). Complex 3 also shows antiferromagnetic (syn–syn μ-OCO), and ferromagnetic coupling (μ-O of the -COO group). Complex 4 with two types (syn–syn and syn–anti) of binding modes of the carboxylate group shows strong antiferromagnetic interaction.

83 citations

Journal ArticleDOI
TL;DR: In this article, the morphology and growth mechanism of silver films approximately 150 A in thickness on Si(001) substrates have been studied by atomic force microscopy and x-ray reflectivity.
Abstract: The morphology and growth mechanism of silver films approximately 150 A in thickness on Si(001) substrates have been studied by atomic force microscopy and x-ray reflectivity. The thin films prepared by dc sputtering at room temperature are composed of islands of silver. The shape and size distribution of these islands are studied using these two complementary measurement techniques.

82 citations


Authors

Showing all 3900 results

NameH-indexPapersCitations
Yves Pommier12378958898
Flemming Besenbacher11472851827
Katsuhiko Ariga11286445242
Shunichi Fukuzumi111125652764
Rajdeep Mohan Chatterjee11099051407
Kwang S. Kim9764262053
Amar K. Mohanty8153831856
Nigel D. Browning8164623621
Andrea Caneschi8043525896
Rodolphe Clérac7850622604
Subrata Ghosh7884132147
Miaofang Chi7730422817
Yuan Ping Feng7765025846
D. D. Sarma7052118082
Asim Bhaumik6946616882
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202310
202283
2021443
2020447
2019452
2018467