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Fluorescent Gel from a Self-Assembling New Chromophoric Moiety Containing Azobenzene Based Tetraamide

IR@IICB: CSIR-Indian Institute of Chemical Biology, Kolkata

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Title Fluorescent Gel from a Self-Assembling New Chromophoric Moiety Containing Azobenzene Based Tetraamide
 
Creator Palui, Goutam
Banerjee, Arindam
 
Subject Chemistry
 
Description Discovery and developments of low molecular-weight organogelators (LMOG) are important due to their unique features1 and their potential applications in nanotechnology,2 pollution control,3 oil-spill recovery,4 and light-harvesting materials,5 in preparing dye sensitized solar cells,6 and in other uses.7 In order to generate a gel-phase material it is necessary to select or construct a molecular building block that will provide a supramolecular three-dimensional network using various noncovalent interactions including hydrogen bonds,8 π-π staking,9 metal coordination,10 and van der Waals interactions.11 A wide range of different types of organic molecules have been investigated as low molecular weight organogelators including saccharides,12 peptides,13 amides,14 ureas,15 nucleobase,16 steroid derivatives17 and others.18 Many of these above-mentioned organogelators self-assemble utilizing hydrogen bonds and/or π-π interactions to form corresponding gels. Smith and his co-workers are the pioneer of amino acid based dendritic organogelator.19 Organogelators with π-conjugated molecular structure have drawn a special attention due to their advantages for displaying various applications in increased charge transport, fluorescence and sensing capabilities.20 However, chromophorebased organogelators, particularly gels based on extended π-conjugated systems21,24 are relatively less in number. Weiss et al.22 and Desvergne et al.23 synthesized anthracene-containing gelators and examined their unique fluorescence properties. Ajoyghosh et al.21g–k synthesized π-conjugated-oligo (p-phenylenevinylene) based gelators, which show unique fluorescent properties. Shinkai et al.24 also designed a triphenylene-based gels showing excimer emission arising from the unusual π-electron overlapping mode of a triphenylene moiety. For all these gelator molecules, long alkyl chains, steroidal groups or trifluoromethyl substituents have been introduced into the gelator structure for attaining the effective gelation process.
 
Date 2008
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://www.eprints.iicb.res.in/216/1/JOURNAL_OF_PHYSICAL_CHEMISTRY_B%2C112_%2C33%2C10107%2D10115%2C__2008[45].pdf
Palui, Goutam and Banerjee, Arindam (2008) Fluorescent Gel from a Self-Assembling New Chromophoric Moiety Containing Azobenzene Based Tetraamide. J. Phys. Chem, 112. pp. 10107-10115.
 
Relation http://dx.doi.org/10.1021/jp801657h
http://www.eprints.iicb.res.in/216/