Driving high quantum yield NIR emission through proquinoidal linkage motifs in conjugated supermolecular arrays
作者:Erin J. Peterson、Wei Qi、Ian N. Stanton、Peng Zhang、Michael J. Therien
DOI:10.1039/d0sc03446k
日期:——
Incorporation of proquinoidal BTD building blocks into conjugated porphyrin oligomers minimizes the extent of excited-state structural relaxation relative to the ground-state conformation, elucidating new classes of impressive NIR fluorophores.
Potentiometric, Electronic Structural, and Ground- and Excited-State Optical Properties of Conjugated Bis[(Porphinato)zinc(II)] Compounds Featuring Proquinoidal Spacer Units
作者:Kimihiro Susumu、Timothy V. Duncan、Michael J. Therien
DOI:10.1021/ja040243h
日期:2005.4.1
We report the synthesis, optical, electrochemical, electronic structural, and transient optical properties of conjugated (porphinato)zinc(II)-spacer-(porphinato)zinc(II) (PZn-Sp-PZn) complexes that possess intervening conjugated Sp structures having varying degrees of proquinoidal character. These supermolecular PZn-Sp-PZn compounds feature Sp moieties (4,7-diethynylbenzo[c][1,2,5]thiadiazole (E-BTD-E)
Molecular Engineering of Intensely Near-Infrared Absorbing Excited States in Highly Conjugated Oligo(porphinato)zinc−(Polypyridyl)metal(II) Supermolecules
作者:Timothy V. Duncan、Tomoya Ishizuka、Michael J. Therien
DOI:10.1021/ja0707512
日期:2007.8.1
structure with the magnitude of the excited-state lifetime (tau(es)) and demonstrate that this parameter can be modulated over 4 orders of magnitude ( approximately 1 ns < tau(es) < 45 micros). Terpyridyl pyrrolidinyl substituents can be utilized to destabilize terpyridyl ligand pi(*) energy levels and diminish the E1/2 (M3+/2+) value of the bis(terpyridyl)metal(II) center: such perturbations determine
Synthesis, spectroscopy, photophysics of multi-chromophoric ZN(II) group 8 metal complexes
申请人:The Trustees of the University of Pennsylvania
公开号:US07445845B2
公开(公告)日:2008-11-04
Novel multichromophoric complexes comprising the formula
R1—RA-[MC]-([RM]z-[MC])m-RA—R2
are provided. Polymeric compositions and devices comprising the same are also discussed. The complexes are characterized by a central bridging moiety comprising one or a plurality of linked conjugated macrocyclic molecules [MC] coupled to at least one inorganic moiety (R1 and/or R2) through organic linker RA. Preparation methods include metal-mediated cross-coupling techniques. The complexes can be useful in nonlinear optical devices and other optoelectronic applications.
Iron-based photosensitizers, which can be used for solar energy conversion and photoluminescence applications, include an iron complex with N-heterocyclic carbene (NHC) ligands (FeNHC), a linking unit, and a polarizable unit formed of a pi conjugated structure having a one-electron reduction potential more positive than NHC.