552315-60-3Relevant academic research and scientific papers
Selective extraction of higher fullerenes using cyclic dimers of zinc porphyrins
Shoji, Yoshiaki,Tashiro, Kentaro,Aida, Takuzo
, p. 6570 - 6571 (2004)
Higher fullerenes (≥C76) were selectively extracted from a fullerene mixture obtained from a combustion-based industrial production source by cyclic dimers of β-unsubstituted porphyrin zinc complexes 2C5-2C7 with C5-C7 alk
Photoresponsive soft materials: Synthesis and photophysical studies of a stilbene-based diblock copolymer
Menon, Sajith,Thekkayil, Remyamol,Varghese, Shinto,Das, Suresh
experimental part, p. 5063 - 5073 (2012/06/01)
An amphiphilic diblock copolymer composed of a photoresponsive dialkoxycyanostilbene polymethacrylate and poly(ethylene oxide) (PDACS-b-PEO) was synthesized and its photophysical and aggregation properties were investigated. The amphiphilic nature of the polymer caused it to self-assemble in water, and dynamic light scattering studies indicated formation of spherical aggregates with an average size of 160 nm. Atomic force microscopy images of dried films cast from solutions containing the polymer aggregates revealed supramolecular aggregates with a spherical morphology. Photoisomerization of the stilbene chromophore in PDACS-b-PEO on UV irradiation resulted in the destruction of the self-assembled superstructures which could be attributed both to change in shape of the chromophore from the linear trans isomer to the bent cis isomer which would hinder self-aggregation of the molecules and the higher dipole moment of the cis isomer leading to a reduction of the hydrophobic nature of the stilbene containing block of PDACS-b-PEO. It was observed that hydrophobic dyes such as curcumin could be encapsulated within the hydrophobic interior of the spherical micellar aggregates from which the encapsulated dye could be released on UV irradiation.
