A facile way to obtain near-infrared room-temperature phosphorescent soft materials based on Bodipy dyes

Abstract

Near-infrared room-temperature phosphorescence was achieved by employing iodine substituted Bodipy into amorphous polymers. The self-healable gels were also obtained with the incorporation of a crosslinker and quadruple hydrogen bond based moieties.

A Time-Resolved Spectroscopic Investigation of a Novel BODIPY Copolymer and Its Potential Use as a Photosensitiser for Hydrogen Evolution

“…The triplet lifetime of 60 µs is similar to triplet state lifetimes measured for other conjugated polymers containing thiophene and fluorene moieties previously measured (20-120 µs) (Yong et al, 2018). Lifetimes in the range 450-710 µs have been reported for polymers with pendant iodosubstituted BODIPY units (Zhang et al, 2020). Triplet excited state species have also been observed for a BODIPY polymer containing an ethynyl thiophene linker (Bucher et al, 2017).…”

Converting molecular luminescence to ultralong room-temperature phosphorescence via the excited state modulation of sulfone-containing heteroaromatics

“…In accordance to Jablonski diagram and emission mechanism of phosphorescence, two key factors should be taken into consideration to achieve highly efficient RTP emitter 14 : (i) strengthening the ISC from the excited singlet state (S m ) to the excited triplet state (T n ) via efficient spin-orbit coupling (SOC), and (ii) suppressing the nonradiative dissipation of the long-lived triplets caused by vibrational, molecular oxygen quenching or others. In this regard, molecular design strategies based on halogen bonding [15][16][17] , n-π transition via heteroatoms (S, P etc) [18][19][20] , and H-aggregation 21,22 , as well as RTP reinforcement approaches based on crystal engineering [23][24][25] , host-guest system [26][27][28] , copolymerization 29,30 and supramolecular interaction 31,32 , etc, have been developed and rendered the realization of pure organic RTP more effective.…”

“…In this regard, molecular design strategies based on halogen bonding, 15–17 n–π transitions involving heteroatoms (S, P, etc. ), 18–20 and H-aggregation, 21,22 and RTP reinforcement approaches based on crystal engineering, 23–25 host–guest systems, 26–28 copolymerization, 29,30 and supramolecular interactions 31,32 have been developed and have allowed the more-effective realization of pure organic RTP.…”

Ultralong Polymeric Room Temperature Phosphorescence Materials Fabricated by Multiple Hydrogen Bondings Resistant to Temperature and Humidity

“…[41][42][43][44] Chen and coworkers discovered that UPy-based organic nanoparticles BrNpA-UPy can emit efficient long-lived phosphorescence (Φ P = 7.7%, τ P = 3.2 ms) in aqueous solution and function as oxygen indicator. [42] Ma group [43,44] obtained water insensitive RTP emission (τ P = 269 µs) by modifying UPy units on small phosphor BrBA, and nearinfrared RTP (λ em = 775 nm, τ P = 0.083 ms) was obtained from Polymeric room temperature phosphorescence (RTP) materials have attracted tremendous attentions owing to their excellent flexibility, easy processing, low cost, and good thermal stability. In this work, an improved strategy is proposed for ultralong RTP polymeric materials through copolymerizing the phosphor monomer with D (donor)−A (acceptor) structure and another monomer with ultrastrong multiple hydrogen bonds.…”