Poly(l-lactide)s with tetraphenylethylene: role of polymer chain packing in aggregation-induced emission behavior of tetraphenylethylene

Abstract

Development of biocompatible and biodegradable fluorescent polymers and understanding their fluorescent characteristics are highly desirable. In this work, we synthesized one-armed, two-armed and four-armed poly(ʟ-lactide)s by ring-opening polymerization of ʟ-lactide...

Polylactide cocrystals and gels

“…[85] Different from the usual polymer gels, in PLLA, the complex crystallization with different solvents results in the formation of gels. [59,60,80,85] This type of crystalline complexes in polymer gels was already reported in sPS, PPO, etc. [54,78,86] Daniel et al reported the gelation of sPS when dissolved in solvents such as 1,2-dichloro ethane or 1-chloro propane through the formation of cocrystals.…”

“…Further heating resulted in the melting of gels. [ 60,80 ] In the blend gel, both homopolymers are crystallized to ε form and on further heating, it transformed into α form at 45°C. Here the transition takes place by excluding out the solvent molecules from the crystal lattice to the amorphous phase through locally disordered helical chains.…”

“…Polymer physical gels are typically formed by aggregation like crystallization, hydrogen bonding, ionic interactions, complex formation, and helix formation. [58,60,[77][78][79][80][81][82] They are also termed thermoreversible gels since the physical crosslinks formed are thermally labile. Semicrystalline polymers form physical gels when dissolved in a suitable solvent.…”

Fluorescence and stimuli-responsive performance of polymer composites filled with tetraphenylethene derivatives

“…Tetraphenylethene (TPE) is a prototypical AIEgen with a simple molecular structure, highly emissive fluorescence, and facile modification with various functionalities, and is also a versatile building block for the construction of novel fluorescent compounds. 14,15 Various TPE derivatives with a subtle difference in the molecular structure have been synthesized and their structure-property relationships were studied. [16][17][18] For example, nitrophenyl groups were combined with the TPE backbone and all derivatives inherited the AIE property of the TPE core.…”

Dual-Color Emission from Spatially Distributed Quantum Dots in Poly(l-lactide) Films with Diverse Morphologies

“…Poly­( l -lactide) (PLLA) is a biocompatible and biodegradable polymer that is produced from renewable resources. Due to its nonconjugated nature, fluorescence emission could only be achieved by the incorporation of chromophores within the backbone or the addition of fluorescent QDs. , Although a few studies have been carried out using the chromophore appended PLLAs, the multicolor emission of PLLAs remains unexplored.…”