Linked Life Data

19908485

Source:http://linkedlifedata.com/resource/pubmed/id/19908485

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
2009-11-13
pubmed:abstractText
Photochromic spiropyran-modified material 1 and hydrogelator 2 bearing sugar and D-alanine moieties were prepared and their thermal- and photo-responsive properties in aqueous solution were investigated by NMR, CD, PXRD, DSC, and UV-vis spectroscopy. The xerogels [1 + 2] (1:1-20 wt%) with various ratios obtained from water showed well-developed fibril structures with diameters of 50-100 nm and length of several hundred micrometers. Interestingly, after irradiation with UV light, these aggregates were destroyed because the closed form (SP) of spiropyran unit of 1 changes to the corresponding merocyanine form (MC). In contrast, further heating led to the original hydrogels [1 + 2], due to the transformation of the opened form (MC) of 1 into the corresponding spiropyran form (SP). Thus, the spiropyran unit of 1 played an important role in the gelation of water by interacting with the gelators in a host-guest interaction that could modify the superstructures and sensitively affect their stability.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Oct
pubmed:issn
1533-4880
pubmed:author
pubmed:issnType
Print
pubmed:volume
9
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5990-6
pubmed:year
2009
pubmed:articleTitle
Sol-gel phase transitions in a photochromic spiropyran-modified material by incorporation in a hydrogel.
pubmed:affiliation
Department of Chemistry and Research Institute of Natural Sciences, Gyeongsang National University, Jinju 660-701, Korea.
pubmed:publicationType
Journal Article