Synthesis and photoresponsive behavior of the high-Tg azobenzene polymers via RAFT polymerization

Incorporation of azo group at axial position of silatranes: synthesis, characterization and antimicrobial activity

“…Compound 1, [20] aminopropylsilatranes 5 and 6 [21] and 7 [22] were prepared as reported in the literature. All reactions were performed under nitrogen atmosphere.…”

Preparation and characterization of novel side-chain azobenzene polymers containing tetrazole group

“…Thus, the block copolymers containing MACA and MMA as structural units were designed to improve forming properties of azobenzene polymers. However, the attempt for preparing block copolymer using PMACA as macro-RAFT agent for MMA polymerization was failed, and the obtained block copolymers have broader molecular weight distributions (M w /M n > 1.50) with still several homopolymer (PMACA) chains, possibly due to the presence of "dead" polymer chains in the original polymer [12]. Thus, the alternative way was used here, e.g.…”

“…In recent years, polymeric materials containing azobenzene chromophore have drawn widespread attention due to their unique optical trans-cis-trans isomerization [1][2][3][4], which can be potentially applied in many fields, such as optical data storage [5,6], liquid crystal display [7][8][9], photoinduced birefringence [10], and holographic surface relief grating [11,12]. As well known, the photoresponsive behavior of azobenzene polymers is based on reversible transcis-trans photoisomerization of the azobenzene chromophore and possibly large-scale mass movement of the rigid azobenzene chromophore [11][12][13][14][15].…”

“…As well known, the photoresponsive behavior of azobenzene polymers is based on reversible transcis-trans photoisomerization of the azobenzene chromophore and possibly large-scale mass movement of the rigid azobenzene chromophore [11][12][13][14][15]. The trans-cis isomerization behavior of azobenzene was adjusted by the substituting groups [16].…”

Rigid and flexible azopolymers modified with donor/acceptor groups. Synthesis and photochromic behavior

“…The distinct properties of these materials are attributed to the photo-isomerization of azobenzene molecules which undergo reversible trans-cis isomerization of the double bond [14], under external stimuli. It should be emphasized that isomerization of the azobenzene is accompanied by large changes in both geometry and dipole moment [15][16][17][18][19]. These photo responsive properties are determined by both azo-chromophore structure and polymeric architecture.…”