Artificial light-harvesting systems (LHSs) based on boron-difluoride (BF₂) hydrazone complexes (BODIHYs)

Abstract

The hydrazone based BF2–complexes (BODIHYs; B1–B2) have been synthesized and their photophysical and aggregation behavior have been established. These BODIHYs have been showed light harvesting properties in presence of RhB as acceptor.

Tuning the Properties of Donor–Acceptor and Acceptor–Donor–Acceptor Boron Difluoride Hydrazones via Extended π-Conjugation

“…A–D–A BODIHY 12 possesses the narrowest E g CV (2.05 eV) which was consistent with the E g Opt of 2.02 eV and the red-shifted λ max relative to other compounds described in this work. In all cases, strong agreement between the E g Opt and E g CV was noted, with minimal differences ranging from 0.03 to 0.19 eV (Table ), and these band gaps were narrower than other BODIHYs reported …”

“…In all cases, strong agreement between the E g Opt and E g CV was noted, with minimal differences ranging from 0.03 to 0.19 eV ( Table 3 ), and these band gaps were narrower than other BODIHYs reported. 66 …”

“…Finally, the E g CV and E g Opt determined for BODIHYs 8 – 13 agreed well, with TH-bridged BODIHY 12 exhibiting the lowest E g CV and E g Opt of 2.05 and 2.02 eV, respectively. The molecular materials described herein show the narrowest band gaps reported to date for BODIHY dyes and, combined with the thin-film emission properties of these materials, this could enable their use in light-harvesting applications which has been seen for other BODIHYs . Collectively, these findings may inspire the design and development of BODIHYs to be further explored for optoelectronic applications such as organic electronics and photovoltaics.…”

“…BODIHYs ( e.g. , 5 ) are BF 2 -containing heterocycles based on chelating pyridylhydrazone ligands, and these materials exhibit aggregation-induced emission and interesting redox chemistry. − We recently developed triphenylamine–BODIHY conjugates ( e.g. , 6 ) that exhibit dual emission, AIE, multiple redox waves, and charge-transfer characteristics .…”

Heterocyclic Phosphenium Cations and Their Divergent Coordination Chemistry

“…Pyridylhydrazonide ligands represent a conjugated, bidentate scaffold for the stabilization of main group elements. They have been successfully used in the preparation of boron difluoride hydrazonides (BODIHYs), where they exhibit properties such as aggregation-induced emission (AIE) and diverse, tunable electrochemical redox. − In this work, we targeted phosphenium cations supported by pyridylhydrazonide ligands. The synthesis and characterization of these cations are reported, and their electronic structure is studied in detail via experimental and computational methods.…”