Premium
Photoinduced Bending of Single Crystals of a Linear Bis‐Olefin via Water‐Templated Solid‐State [2+2] Photopolymerization Reaction
Author(s) -
Mandal Rajorshi,
Garai Abhijit,
Peli Simone,
Datta Prasanta K.,
Biradha Kumar
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201904481
Subject(s) - photopolymer , polymerization , polymer , monomer , materials science , molecule , photochemistry , crystal (programming language) , reactivity (psychology) , olefin fiber , polymer chemistry , chemical engineering , chemistry , organic chemistry , composite material , medicine , alternative medicine , pathology , computer science , programming language , engineering
The single crystals of two structural isomers of bis‐olefinic molecules were shown to have contrasting properties in terms of their photoreactivity: one exhibits an excellent ability to form polymers, accompanied with bending of crystals upon irradiation, while the other is photostable. The photoreactive crystal is a first example in which [2+2] polymerization leads to bending of the crystals, with implications for the design of photoactuators. The hydrate formation ability of one of these molecular isomers promotes the solid‐state reactivity in its crystal, as the H 2 O molecules act as a template to bring the olefin molecules into the required arrangement for [2+2] polymerization. Further, the crystals of the polymer exhibited better flexibility and smoothed surfaces compared to those of the monomers. In addition, under UV‐light the diene emits bluish violet light while the polymer emits green light, indicating that the luminescence property can be tuned through photoirradiation.