Effect of the electron donating group on the excited-state electronic nature and epsilon-near-zero properties of curcuminoid-borondifluoride dyes

Abstract

Epsilon-near-zero (ENZ) properties have been reported in organic molecular films.

Nanoconstruction of curcuminoid boron difluoride dyes with aggregation-induced emission for bright near-infrared fluorescence imaging of malignant tumor

“…Curc-TPA was synthesized according to the procedure previously reported. 19 Acetyl acetone and BF 3 ·Et 2 O were initially reacted at 55 °C, and then TPA was added for aldol condensation to obtain the final product (Fig. 1a).…”

“…Curc-TPA was synthesized through a simple and improved aldol condensation reaction. 19 Briefly, acetylacetone (150 μL, 1 eq.) and BF 3 ·Et 2 O (199 μL, 1 eq.)…”

“…18 They were further stably encapsulated into porous silica NPs and used for NIR fluorescence imaging-visualized diagnosis of renal cell carcinoma in vitro and in vivo . 19 However, the aggregation-induced optical property change in curcuminoid boron difluoride dyes has not been fully explored. In this study, it was surprising to observe the classical aggregation-induced emission (AIE) phenomenon of the triphenyl ring benzaldehyde derivatives of curcuminoid.…”

Unsymmetrical boron diketonates containing strong electron-donating groups as mechanochromic fluorescent solids

“…This assembly is a merocyanine, and as such, can either gives rise to push-pull or cyanine dyes behavior depending on the resonance form (Figure 1), the cyanine form is also referred in literature as dioxaborazine. 42,43 Figure 1. BDK compounds and resonance forms, equilibrium between push-pull and cyanine forms.…”

Dielectric behavior of curcuminoid polymorphs on different substrates by direct soft vacuum deposition

“…As far as electronic devices are concerned, there are only a few examples reported with curcumin and coordinated systems, listed as appealing for ecofriendly applications in the framework beyond-CMOS devices, 27 although it is important to note that there has been increasing interest in boron difluoride CCMoids due to their potential optoelectronic applications. 28 , 29 , 30 Taking into account CCMoids structural diversity, their projection in molecular-based electronics is promising, but still limited, 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 with an increasing need to gather information and improve designs. Beyond their use as an active layer in electronic devices, wide band gap materials can be of interest as a dielectric in capacitors and transistors combined with different electronic elements.…”