Structure-controlled intramolecular charge transfer in asymmetric pyrene-based luminogens: synthesis, characterization and optical properties

Abstract

Full-color emitting materials have always been widely concerned and studied benefiting from their promising application potential in fluorescence imaging and optoelectronic devices. In this paper, four asymmetrically D-A type pyrene-based...

A substituent-dependent deep-blue pyrene-based chemosensor for trace nitroaniline sensing

“…On the other hand, TetraPhPy reveals a distinct red-shift of 18 nm relative to the luminogen TriPhPy , which may be ascribed to the influence of the difference of the molecular arrangement and intermolecular interactions due to the different number of substituents. 41…”

“…On the other hand, TetraPhPy reveals a distinct redshift of 18 nm relative to the luminogen TriPhPy, which may be ascribed to the influence of the difference of the molecular arrangement and intermolecular interactions due to the different number of substituents. 41 A detailed investigation of the solvatochromic effects of both luminogens in different organic solvents with various polarities was performed, which can effectively elucidate the luminescence mechanism by comparing the photophysical properties in different states. As shown in Fig.…”

K-region tetrasubstituted deep-blue pyrene-based luminogens: Visual detection of trace nitroaniline

“…To further evaluate the material properties, the absolute fluorescence quantum yields (ΦFL) and the emission behavior in the solid state were investigated. As compared with the emission properties in diluted solution, the emission spectra of both luminogens exhibit a small range of shift (427 nm for TFPy, 437 nm for TTPy), which may be ascribed to the dual influence of monomer emission and ICT emission [36,37].…”

Influence of Steric Effects on the Emission Behavior of Pyrene-Based Blue Luminogens

“…On the other hand, organic blue emitters as one of the significant components for full-color displays also have certain drawbacks due to the limited stability, relatively large energy gaps, etc. , It still remains a challenge to construct high-performance blue-emissive pyrene-based AIEgens through molecular engineering. Pyrene as a great building block for blue fluorescent materials has become a focus of much research given that it not only possesses the intrinsic blue-light emission but also is readily functionalized at different active sites depending on the controllable experimental conditions, − and this can result in diverse photophysical and chemical properties. Among them, bromo-containing pyrene-based chemical intermediates can act as pivotal precursors for the synthesis of assorted C-functionalized pyrene-based luminescent materials via metal-catalyzed cross-coupling reactions. − Thus, developing novel bromo-containing pyrene-based precursors is of great significance and can open up infinite possibilities in the field of new pyrene-containing multifunctional optoelectronic materials for real applications.…”