Crystallization-Induced Hybrid Nano-Sheets of Fluorescent Polymers with Aggregation-Induced Emission Characteristics for Sensitive Explosive Detection

Abstract

Fluorescent organic hybrid nanosheets were generated by crystallization of polymers capped with luminogenic molecules exhibiting aggregation-induced emission characteristics (AIE). During crystallization of polymers, AIE molecules were expelled out of lamellar crystals of polymers, and finally resided on the surface. The fluorescent nanosheets with dangling AIE molecules showed sensitive and specific response to explosives. Such polymer crystallization-induced fluorescent nanomaterials offers a unique avenue to fabricate functional nanomaterials with AIE molecule-enriched domains for potential applications in nanodevices, biological engineering, and so on.

Graphene-induced tiny flowers of organometallic polymers with ultrathin petals for hydrogen peroxide sensing

“…The intensity of the absorbance band increased with increasing Fe 3+ amount until one equivalent mole of Fe 3+ was added, which illustrated that Fe 3+ involved in the reaction. This implied that cyanoferrate complex was expelled from PE crystals and located on the surface of PE lamellae during crystallization of polyethylene [39,41], which facilitated the subsequent coordination polymerization with Fe 3+ .…”

“…When the temperature cools down, PE chains fold up to form lamellae, regarded as crystallization. During crystallization of PE, the end groups of ferrate complex and graphene nanosheets are expelled from lamellae and reside on the surface [39]. Such inorganic ferrate layers and graphene nanosheets having high free energy are inclined to absorb PE segments and initiate the crystallization of PE in turn.…”

“…Crystallization-driven cylindrical micelles were amendable to polyethylene (PE) and poly(e-caprolactone) (PCL) based block copolymers [36][37][38]. Recently, fluorescent polymer nanosheets have been fabricated through crystallization of polymers [39]. Crystallizable polymers terminated with fluorescent group were allowed to crystallize.…”

Aggregation-Induced Emission from Fluorophore–Quencher Dyads with Long-Lived Luminescence

“…Molecular materials exhibiting aggregation-induced emission (AIE) are very important candidates in various applications such as optoelectronics, 1-8 luminescence chemosensing [11][12][13][14][15] and biological imaging. [16][17][18][19][20][21][22][23] The advantage of AIE materials arises from their solid-state nature that includes high photoluminescent brightness and low photobleaching rate.…”

Large-scale synthesis of organometallic polymer flowers with ultrathin petals for hydrogen peroxide sensing

“…[19][20][21][22][23][24] PFS based copolymers (PFS: poly(ferrocenyldimethylsilane)) self assembled into cylindrical micelles with PFS forming cores surrounded by a corona of the other blocks, which was driven by crystallization of the PFS block. Macromolecular chains fold back and forth during crystallization to form anisotropic nanostructures with varied morphologies including rods, lamellae, and so on, depending on the composition and chain structure of polymers as well as self-assembly conditions.…”