dc.contributor.author |
Dasgupta, D |
|
dc.contributor.author |
Srinivasan, S |
|
dc.contributor.author |
Rochas, C |
|
dc.contributor.author |
Ajayaghosh, A |
|
dc.contributor.author |
Guenet, J-M |
|
dc.date.accessioned |
2013-12-02T10:22:45Z |
|
dc.date.available |
2013-12-02T10:22:45Z |
|
dc.date.issued |
2011 |
|
dc.identifier.citation |
Soft Matter 7(19):9311-9315;2011 |
en_US |
dc.identifier.issn |
1744-683X |
|
dc.identifier.uri |
http://ir.niist.res.in:8080/jspui/handle/123456789/872 |
|
dc.description.abstract |
We have investigated the decisive role of the solvent type in the gelation of an oligo(p-phenylene vinylene) molecule with OH functions on the terminal groups (OPVOH). We show that gels of "hublike" morphology are obtained with benzyl alcohol, a solvent that mimics the chemical structure of the terminal groups, whereas a "randomly dispersed" morphology is obtained with trans-decahydronaphthalene and with benzyl methyl ether, a solvent very similar to benzyl alcohol except that the hydrogen of the OH function has been replaced by a CH3 group. Also, the thermodynamic behaviour, gel formation and gel melting are similar for benzyl methyl ether and trans-decahydronaphthalene but are significantly different in benzyl alcohol: the gel melting point is higher, and so is the melting enthalpy. Extrapolation of this parameter to 100% OPVOH gives a value significantly higher than that directly measured on pure OPVOH. Molecular organization as studied by X-ray diffraction and fluorescence properties follow the same trend. The occurrence of a molecular compound between OPVOH and benzyl alcohol is contemplated in an attempt to account for these outcomes. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Royal Society of Chemistry |
en_US |
dc.subject |
Photoinduced charge-transfer |
en_US |
dc.subject |
Thermoreversible gels |
en_US |
dc.subject |
Oligo(p-phenylene vinylene)s |
en_US |
dc.subject |
Pi-organogels |
en_US |
dc.subject |
Encapsulation |
en_US |
dc.subject |
Emission |
en_US |
dc.title |
Solvent-Mediated fiber growth in organogels |
en_US |
dc.type |
Article |
en_US |