Sushil N Lambud

Institute of Chemical Technology, Mumbai, Chemistry, Alumnus

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Romanian Institute for Research on Minorities Issues

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Papers by Sushil N Lambud

Cover Feature: Synthesis and Optical Property Modulation of Substituted [2.2]Paracylophanes through Through‐Space Conjugation (Eur. J. Org. Chem. 25/2024)

European journal of organic chemistry, Jul 1, 2024

Dual State Emissive Pyrene-Fused Benzopyrazaacenes and their Solvatochromic Behaviour

Journal of molecular structure, May 1, 2024

CCDC 2110171: Experimental Crystal Structure Determination

The Cambridge Structural Database, 2022

Synthesis and Optical Property Modulation of Substituted [2,2]-paracylophanes through Through-Space Conjugation

4,16-para-substituted [2,2] paracylophane with naphthalene (PCP⎼NAP), anthracene (PCP⎼ANTH), and ... more 4,16-para-substituted [2,2] paracylophane with naphthalene (PCP⎼NAP), anthracene (PCP⎼ANTH), and tetraphenylethylene (PCP⎼TPE) as a new through-space conjugated dimers were prepared by the Suzuki-Miyaura cross-coupling reaction of 4, 16-diboryl [2,2] paracyclophane and respective bromo derivative using Pd(PPh3)4 as a catalyst and KOH as a base. The synthesized compounds were fully characterized by NMR, HR-MS and their photophysical, and electrochemical properties were studied. The quantum yield of PCP⎼NAP, PCP⎼ANTH and PCP-TPE were calculated and estimated as 0.21, 0.50 and 0.31 respectively. PCP⎼TPE exhibited aggregation-induced emission characteristics when the water fraction was higher than 50% in the THF/water mixtures. PCP-ANTH and PCP-TPE were also characterized by X-ray Crystallography, obtained single crystal of PCP-ANTH crystalizes in centrosymmetric monoclinic space group C2/c. A single crystal of PCP-TPE crystallizes in the centrosymmetric triclinic space group P⎼1 with one molecule residing on the inversion centre. The observed properties of these π-stacked dimers were compared through through-space Conjugation and conjugation length in the structure.

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Unexpected formation of 2-methyl-1H-naphtho [2, 3-d] imidazole via decarboxylation governed mechanistic pathway

Chemical Physics

Present work is the outcome of the synthetic strategy for the naphthalene analogue of benzimidazo... more Present work is the outcome of the synthetic strategy for the naphthalene analogue of benzimidazole dimer, 2-methyl-1H-naphtho [2, 3-d] imidazole. It was found that 1H-naphtho [2, 3-d] imidazol-2-yl) methane (2b&#39;) was formed instead of respective dimer. Herein, we have reported two synthetic ways for 2b&#39;, first conventional refluxing method with 70 % yield and second by using synthesis reactor with 75 % yield. Both the way of synthesis involves the reaction of 2,3- diamino naphthalene and diethyl malonate in acidic medium. This example belongs to C-2(sp2)-C-1(sp3) type decarboxylation. To the best of our knowledge, it is the first-time synthesis of the 2b‘ has been reported via decarboxylation pathway along with crystal structure and DFT studies. Most probable mechanisms for both the compounds have been proposed based on the energy profile diagram and thermodynamic data obtained by DFT calculations [B3LYP/6-311++G (d,p)] in gas phase. Absorption responses showed potential of the naphthaimidazole based molecule 2b‘ as a pH and metal ion sensor of various hazardous metals such as As3+, Cr3+, Hg2+,Cd2+, Pb2+.