NDLI: Photoresponsive dithienylethene-urea-based organogels with “reversed” behavior

Please wait, while we are loading the content...

Aminolysis of 4-nitrophenyl phenyl carbonate and thionocarbonate: effects of amine nature and modification of electrophilic center from CO to CS on reactivity and mechanism

An oxidatively-activated safety catch linker for solid phase synthesis

Stereoselective NaN₃-catalyzed halonitroaldol-type reaction of azetidine-2,3-diones in aqueous media

Stereochemistry of 1,2-elimination reactions at the E2–E1cB interface—tert-butyl 3-tosyloxybutanoate and its thioester

Synthesis and evaluation of novel pyridine based PLG tripeptidomimetics

Asymmetric synthesis of vicinal amino alcohols: xestoaminol C, sphinganine and sphingosine

Asymmetric synthesis of N,O,O,O-tetra-acetyl d-lyxo-phytosphingosine, jaspine B (pachastrissamine), 2-epi-jaspine B, and deoxoprosophylline via lithium amide conjugate addition

Pyrrolo-dC oligonucleotides bearing alkynyl side chains with terminal triple bonds: synthesis, base pairing and fluorescent dye conjugates prepared by the azide–alkyne “click” reaction

Back matter

Back cover

Organic & Biomolecular Chemistry Vol - 6 Issue - 8

Organic & Biomolecular Chemistry Vol - 6 Issue - 7

Organic & Biomolecular Chemistry Vol - 6 Issue - 6

Organic & Biomolecular Chemistry Vol - 6 Issue - 5

Organic & Biomolecular Chemistry Vol - 6 Issue - 4

Organic & Biomolecular Chemistry Vol - 6 Issue - 3

Organic & Biomolecular Chemistry Vol -5

Organic & Biomolecular Chemistry Vol -4

Organic & Biomolecular Chemistry Vol -3

Organic & Biomolecular Chemistry Vol -2

Photoresponsive dithienylethene-urea-based organogels with “reversed” behavior

Content Provider	Royal Society of Chemistry (RSC)
Author	Uchida, Kingo Caroli, Giuseppe Stuart, Marc Jong, Jaap J. D. de Areephong, Jetsuda Browne, Wesley R. Feringa, Ben L. Akazawa, Masako
Copyright Year	2008
Abstract	Dithienylperhydrocyclopentene-bisurea-based low molecular weight gelators are described that function as photoresponsive organogels that show a remarkable gel-to-liquid transition upon irradiation. The two series of derivatives, with and without alkyl spacers between the urea hydrogen bonding groups and the photochromic unit, show different gelation behavior. Upon UV irradiation of the gels, a gel liquified at only 1.4% conversion of the photochromic unit. Transmission electron microscopy (TEM) shows that the gel fibres consist of thin ribbons. Semi-empirical (PM3) calculations indicate that the hydrogen bonding between the open-ring isomer (o) molecules is weak, and that formation of the closed-ring isomer (c) destabilises the hydrogen bonding further. The results indicate that a small amount of the closed-ring isomer will disrupt the intermolecular hydrogen-bonding, leading to disintegration of the gel fibre ribbons and hence reversible liquification.
Starting Page	1544
Ending Page	1547
Page Count	4
File Format	HTM / HTML PDF
ISSN	14770520
Volume Number	6
Issue Number	9
Journal	Organic & Biomolecular Chemistry
DOI	10.1039/b802580k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Urea Transmission electron microscopy Photochromism Alkane Organogels New Shepard Hydrogen bond Isomer
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry Physical and Theoretical Chemistry

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Photochromic performance of a dithienylethene–indolinooxazolidine hybrid

Reversible gel–sol photoswitching with an overcrowded alkene-based bis-urea supergelator

Diastereoselective cyclization of a dithienylethene switch through single crystal confinement

Photochromism of dithienylethene single crystals having anthracene substituents

Photoresponsive supramolecular self-assemblies at the liquid/solid interface

Fluorescence Commutation and Surface Photopatterning with Porphyrin Tetradithienylethene Switches

Nucleation and stability of hydrogen-bond surrogate-based α-helices†

Selective product amplification of thymine photodimer by recognition-directed supramolecular assistance

Seven-coordinate anion complex with a tren-based urea: Binding discrepancy of hydrogen sulfate in solid and solution states †

Photoresponsive dithienylethene-urea-based organogels with “reversed” behavior

Similar Documents

Photochromic performance of a dithienylethene–indolinooxazolidine hybrid

Reversible gel–sol photoswitching with an overcrowded alkene-based bis-urea supergelator

Diastereoselective cyclization of a dithienylethene switch through single crystal confinement

Photochromism of dithienylethene single crystals having anthracene substituents

Photoresponsive supramolecular self-assemblies at the liquid/solid interface

Fluorescence Commutation and Surface Photopatterning with Porphyrin Tetradithienylethene Switches

Nucleation and stability of hydrogen-bond surrogate-based α-helices†

Selective product amplification of thymine photodimer by recognition-directed supramolecular assistance

Seven-coordinate anion complex with a tren-based urea: Binding discrepancy of hydrogen sulfate in solid and solution states †

Photoresponsive dithienylethene-urea-based organogels with “reversed” behavior