sreejith s
Annamalai University, Mathematics, Graduate Student
Functional mesoporous silica nanoparticles (MSNPs) that can be readily modulated by controllable triggers, such as pH value changes,[1] chemical treatments,[2] electrostatic interactions,[3] enzymatic actions,[4] redox changes,[5] and... more
Functional mesoporous silica nanoparticles (MSNPs) that can be readily modulated by controllable triggers, such as pH value changes,[1] chemical treatments,[2] electrostatic interactions,[3] enzymatic actions,[4] redox changes,[5] and photoirradiation,[6] have been used effectivly for controlled drug delivery. Among these stimulus conditions, photothermal action can be considered a clean source of energy, and photothermal-powered molecular machines can be reversibly operated and do not generate byproducts.
The excited state intra ligand charge transfer (ICT) property of fluorophores has been extensively used for the design of fluorescent chemosensors. Herein, we report the synthesis and properties of three donor-πacceptor-π-donor... more
The excited state intra ligand charge transfer (ICT) property of fluorophores has been extensively used for the design of fluorescent chemosensors. Herein, we report the synthesis and properties of three donor-πacceptor-π-donor (D-π-A-π-D) based molecular probes BP, BT and BA. Two heteroaromatic rings, pyrrole (BP), and thiophene (BT) and a non-heteroaromatic ring N-alkoxy aniline (BA) were selected as 10 donor moieties which were linked to a bipyridine binding site through a vinylic linkage.
Squaraine dyes were loaded inside mesoporous silica nanoparticles followed by wrapping the nanoparticle surface with monolayer graphene oxide sheets, leading to the formation of a novel hybrid material. The hybrid exhibits remarkable... more
Squaraine dyes were loaded inside mesoporous silica nanoparticles followed by wrapping the nanoparticle surface with monolayer graphene oxide sheets, leading to the formation of a novel hybrid material. The hybrid exhibits remarkable stability and can efficiently protect the loaded dyes from nucleophilic attack. The biocompatible hybrid is non-cytotoxic and presents a significant application potential towards in vitro fluorescence imaging.
The tunable excited-state properties of a new donor–π-acceptor–π-donor-type fluorophore 1 with a bipyridyl moiety and its ability to respond to different analytes in solution and on paper microchannels are described. Furthermore, the... more
The tunable excited-state properties of a new donor–π-acceptor–π-donor-type fluorophore 1 with a bipyridyl moiety and its ability to respond to different analytes in solution and on paper microchannels are described. Furthermore, the multiple analyte response of fluorophore 1 has been exploited to perform multiple logic operations. Molecule 1, by virtue of its excited-state charge transfer, exhibits solvatochromism and reversible modulation of its emission in response to multiple chemical inputs, thus resulting in different fluorescent signals.
A chiral π-conjugated oligomer having alternate bipyridine and carbazole moieties connected through acetylinic bonds undergoes helical folding in chloroform–acetonitrile (40/60, v/v) as evident by fluorescence and circular dichroism... more
A chiral π-conjugated oligomer having alternate bipyridine and carbazole moieties connected through acetylinic bonds undergoes helical folding in chloroform–acetonitrile (40/60, v/v) as evident by fluorescence and circular dichroism changes. In the presence of transition metal cations such as Zn 2+ defolding of the helical conformation occurs. Upon decomplexation of the cation with EDTA, the helical conformation is regained.
Solid materials which can adsorb and store hydrogen, carbon dioxide and methane are gaining importance because of the challenges faced in the energy and environment sectors. Several materials have been examined for the adsorption and... more
Solid materials which can adsorb and store hydrogen, carbon dioxide and methane are gaining importance because of the challenges faced in the energy and environment sectors. Several materials have been examined for the adsorption and storage of hydrogen. There is a notion that a material comprising light elements may be better for the adsorption and storage of hydrogen. In this context, carbon nanotubes and graphene would be expected to be suitable materials for the purpose.
Abstract: The capacity and miniaturization of information storage and processing technology are rapidly approaching a limit. Alternative materials and operating principles for the elaboration and communication of data in electronic... more
Abstract: The capacity and miniaturization of information storage and processing technology are rapidly approaching a limit. Alternative materials and operating principles for the elaboration and communication of data in electronic circuits and optical networks must be identified. Molecular level computing is predicted as the ultimate solution to overcome the present limitation of computing devices in terms of storage capacity and processing speed.
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Page 1. Public International Law and the WTO: A Reckoning of Legal Positivism and Neoliberalism SG SREEJITH* Table of Contents I. Introduction 6 II. International Law and the Common Skepticism About Its Legality 8 III. The ...
Herein, we report the use of a fluorophore 3, and its fluorescent zinc complex 4 for the detection of endogenous cyanide content in natural products. The design is based on the fact that bipyridines conjugated with heterocyclic end... more
Herein, we report the use of a fluorophore 3, and its fluorescent zinc complex 4 for the detection of endogenous cyanide content in natural products. The design is based on the fact that bipyridines conjugated with heterocyclic end functional moieties selectively form fluorescent ...