Nopinone-based aggregation-induced emission (AIE)-active difluoroboron β-diketonate complex: photophysical, electrochemical and electroluminescence properties

Abstract

Four difluoroboron (BF 2 ) b-diketonate nopinone complexes 3a-3d that exhibited typical aggregationinduced emission (AIE) properties were synthesized using the natural renewable b-pinene derivative nopinone as the starting material. The thermal, photophysical, electrochemical and electroluminescent properties as well as the AIE properties of complexes 3a-3d were analyzed systematically. The data of photophysical and electrochemical demonstrated that compound 3b with a methoxy group exhibited the largest bathochromic shift, the highest absolute photoluminescence quantum yields and narrowest optical bandgap among 3a-3d. Using 3b as the emitter, electroluminescent (EL) device I exhibits bluegreen light with CIE coordinates of (0.2774, 0.4531) and showed a better performance with a luminous efficacy (h p ) of 7.09 lm W À1 and correlated color temperature (T C ) of 7028 K. The results demonstrate that new AIE compounds are promising solid-state luminescent materials with practical utility in electroluminescent materials. Scheme 1 Synthetic route of compounds 3a-3d. 30056 | RSC Adv., 2018, 8, 30055-30060 This journal is

Recent advances in the synthesis of luminescent tetra-coordinated boron compounds

“…The device studied using 29 (R = OCH 3 ) showed a luminous efficacy of 7.09 lm W −1 . 47 Dithienylethene containing boron-β-diketonates were synthesized and studied for their multiresponsive character including photoresponse under photoexcitation by different groups. [48][49][50][51][52][53] Compound 30 was utilized by Yam's group and compound 31 was studied by the Li group (Fig.…”

Tetrachromophoric Derivatives of Dibenzoylmethanatoboron Difluoride Based on Stereoregular Cyclotetrasiloxanes: Synthesis and Properties

“…Complexes based on difluoroboron β-diketonate (dkBF 2 ) derivatives are widely used in various fields of science and technology. Due to the valuable spectral properties of these compounds in the solution and the solid state, as well as their ability to self-organize, they find application as materials for biosensors, bioimaging, and optoelectronics, , materials with aggregation-induced emission, − mechanochromic ,,− and photochromic − materials, components of organic solar cells, , and light-harvesting systems . Also, these boron complexes can be utilized as luminescent probes for detection of oxygen, − amines, ,,, and cyanide ions, as well as molecular thermometers, , pH sensors, thermochromic logic gate devices, etc.…”

Tetraphenylethylene-Based Nanogels by Physical Encapsulation Technology: An AIEgen Transparent Film Thermometers

“…The development of AIEgens with ex-stimuli luminescence properties is attractive and challenging, which has been demonstrated in diverse fields, such as monitoring for cell behavior, , probing heavy metal ions in the wastewater, and in situ observing polymeric behavior . According to the different ex-stimuli, three types of AIEgens have been developed: (1) mechanoluminescence, − (2) electroluminescence, − and (3) thermoluminescence. , For example, Jiarui Xu primarily introduced 4-carbazol-10-phenothiazine diphenyl sulfone as delayed fluorescence AIEgens with a mechanoluminescence property . To reveal the mechanism of mechanoluminescence, a series of AIEgens with mechanoluminescence were developed .…”