Glass engineering of aminotriazine-based materials with sub-ambient T_g and high kinetic stability

Abstract

Designing molecular glasses with phenyl rings favors a lower Tg and higher glass stability compared to cyclohexyl analogues.

Supramolecular glasses with color-tunable circularly polarized afterglow through evaporation-induced self-assembly of chiral metal–organic complexes

“…There exist some intrinsic drawbacks to these preparation methods, including the possible quenching of photo-activities (e.g., luminescence) at high temperature, the poor transparency ascribed to the decomposition of organic linkers during processing, as well as the difficulty in the precise control of shapes. Additionally, there are limited categories of building blocks in the as-reported SGs, such as ureidopyrimidinone derivatives 24 , 25 , triazine derivatives 26 , 27 and azobenzenes derivatives 28 , 29 . Collectively, these deficiencies have made the fabrication of high-performance SGs difficult and thus restricted the embedding of SGs into various applications.…”

Macroscopic Assembly of Chiral Hydrogen‐bonded Metal‐free Supramolecular Glasses for Enhanced Color‐tunable Ultralong Room Temperature Phosphorescence

“…Currently, to fabricate molecule‐based glasses (MGs), the monomeric species were usually designed as non‐planar or irregular shapes, which could avoid the easy packing of molecules and restrict the crystallization [23] . Based on this concept, several families of organic systems, e.g., triphenylamine, 1,3,5‐triphenylbenzene, triazine, and ureidopyrimidinone derivatives for the fabrication of MGs have been explored (Figure S1) [24–29] . Nevertheless, the non‐planar configurations of the monomers and relatively tedious synthesis steps may hinder the monomer units to directly assemble into photoactive glasses, leading to the unpredictability of MGs formation.…”

“…[23] Based on this concept, several families of organic systems, e.g., triphenylamine, 1,3,5-triphenylbenzene, triazine, and ureidopyrimidinone derivatives for the fabrication of MGs have been explored (Figure S1). [24][25][26][27][28][29] Nevertheless, the non-planar configurations of the monomers and relatively tedious synthesis steps may hinder the monomer units to directly assemble into photoactive glasses, leading to the unpredictability of MGs formation. Hence, exploiting new classes of building block species to fabricate optically bulk MGs remains a formidable challenge.…”