Self-assembly and nonlinear optical properties of a synthetic dipeptide

Maity, Suman Kumar; Kumar, Ravi; Ambast, Deepak K. S.; Pal, Bipul; Haldar, Debasish

doi:10.1039/c2jm34338j

Cited by 10 publications

(8 citation statements)

References 32 publications

(9 reference statements)

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“…10 Moreover, nitro-aryl moieties play key roles in the physical and chemical properties and self-assembly process in peptide chemistry. 11 In general, in industry aromatic nitro compounds are produced by electrophilic nitration of arenes with HNO 3 in drastic acidic conditions. Under these drastic conditions functional group tolerance, over-nitration and regioselectivity can be problematic.…”

Section: Introductionmentioning

confidence: 99%

An efficient one pot ipso-nitration: structural transformation of a dipeptide by N-terminus modification

2015

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The one pot ipso-nitration of Boc-capped rigid dipeptide Boc-Maba-Aba-OMe 1 gave poor yields under excess NaNO2 in dilute mineral acidic medium at 0°C. The yield is improved with the use of catalytic amount of CuSO4. The N-terminus modification leads to structural transformation of the dipeptide from anti parallel to parallel -sheet. We have also explored the reverse reaction by one pot reduction of nitro group to amine and Boc protection.concentrations were in the range 1-10 mM in CDCl 3 or in DMSO-d 6 . FT-IR SpectroscopyAll reported solid-state FT-IR spectra were obtained with a Perkin Elmer Spectrum RX1 spectrophotometer with the KBr disk technique. UV/Vis spectroscopyUV/Vis absorption spectra were recorded on a UV/Vis spectrophotometer (Hitachi).CuSO 4 catalyzed one pot ipso-nitration of rigid dpeptide leads to structural transformation from anti parallel to parallel β-sheet.

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Section: Introductionmentioning

confidence: 99%

An efficient one pot ipso-nitration: structural transformation of a dipeptide by N-terminus modification

2015

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“…In addition to Ag‐NPs, Pd‐NPs were also successfully prepared from a calcium cholate hydrogel by the reduction of potassium tetrachloropalladate(II) with sodium cyanoborohydride in situ (Figure ) . As demonstrated by the Suzuki reaction of aryl boronic acid and aryl halides (X=I and Br), the Pd‐NPs revealed good catalytic activity with a wide substrate scope, and could be reused four times.…”

Section: Gel Nanocomposites In Catalysismentioning

confidence: 99%

Recent Advances in Supramolecular Gels and Catalysis

Fang

Zhang

et al. 2018

Chemistry An Asian Journal

119

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Over the past two decades, supramolecular gels have attracted significant attention from scientists in diverse research fields and have been extensively developed. This review mainly focuses on the significant achievements in supramolecular gels and catalysis. First, by incorporating diverse catalytic sites and active organic functional groups into gelator molecules, supramolecular gels have been considered as a novel matrix for catalysis. In addition, these rationally designed supramolecular gels also provide a variety of templates to access metal nanocomposites, which may function as catalysts and exhibit high activity in diverse catalytic transformations. Finally, as a new kind of biomaterial, supramolecular gels formed in situ by self-assembly triggered by catalytic transformations are also covered herein.

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“…This is popularly known as the thermal lensing effect. [59][60][61] The radially varying intensity profile of a Gaussian laser beam sets up a radially varying temperature profile in the sample. This results in a radial density gradient leading to a refractive index gradient over the beam cross-section.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical responses of all-inorganic lead halide perovskite nanostructures by time-resolved beam-deflection technique

Roy,

Mandal,

et al. 2019

Preprint

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We have investigated nonlinear refraction in all-inorganic halide perovskites, the CsPbBr3 and CsPbBr1.5I1.5 nanosheet and quantum dot colloids in toluene, by a novel beam deflection technique using near-resonant continuous wave lasers. The nonlinear refraction and its time-evolution measured here have originated from thermal lensing effect. Nonlinear behaviour of heat transport in terms of intensity dependent thermal diffusion rate has been observed. Effects of convective heat flow have been measured at high intensities. Quantum dots have higher nonlinear refraction as compared to the corresponding nanosheet samples, presumably due to reduced dimensionality. The effective values of nonlinear refractive index, estimated here for near-resonant excitations, exceed those reported in the literature for organic-inorganic hybrid perovskites in the nonresonant excitation regime, by several orders of magnitude.

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Self-assembly and nonlinear optical properties of a synthetic dipeptide

Cited by 10 publications

References 32 publications

An efficient one pot ipso-nitration: structural transformation of a dipeptide by N-terminus modification

An efficient one pot ipso-nitration: structural transformation of a dipeptide by N-terminus modification

Recent Advances in Supramolecular Gels and Catalysis

Nonlinear optical responses of all-inorganic lead halide perovskite nanostructures by time-resolved beam-deflection technique

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