Investigating Electronic Communications in meso–meso Ethene‐Bridged Unsymmetrical Diporphyrins

Abstract

At the focal point of this work is the photophysical characterization of three meso–meso ethene‐bridged diporphyrins featuring a diverse metallation pattern. Detailed investigations by means of cyclic voltammetry, absorption, fluorescence, and femto‐/nanosecond transient absorption spectroscopy revealed the impact of open‐shell nickel(II) on the electronic communication in ethene‐bridged heterobimetallic diporphyrins.

Photoinduced Electron Transfer and Energy Transfer Processes in a Flexible BODIPY-C60 Dyad

“…Studies on these light-induced processes, and more specifically electron transfer, are of prime importance not only from a fundamental point of view but also for practical applications. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Indeed, conversion of solar light energy into electricity in photovoltaics or to chemical energy (solar fuel) through photocatalytic processes invariably starts with photoinduced electron transfer (PET). 22 Consequently, a huge number of donor-acceptor conjugates have been designed and light-induced electron transfer and/or energy transfer events in solution have been probed.…”

Reducing Energy Loss in Organic Solar Cells by Changing the Central Metal in Metalloporphyrins

“…Finally, a broad band (peaked at 722 and 682 nm, respectively) is consequence of a charge-transfer process; blue-shift of this band in VC9 respecting to VC8 is consequence of the lower donor character of Niporphyrins respecting to those with Zn as central metal. [23,[35][36][37] Additionally, in order to confirm the ICT character of the band around 700 nm, spectra were recorded using solvents with growing polarity (toluene, dichloromethane and benzonitrile, Figure S26). Besides an increase of the intensity of the ICT band with solvent polarity, a red shift of 20 nm and 28 nm respectively was observed when the solvent polarity increases from toluene to benzonitrile [VC8: λ max (toluene) = 714 nm; λ max (benzonitrile) = 742 nm]; VC9: λ max (toluene) = 676 nm; λ max (benzonitrile) = 696 nm] confirming the more stabilized excited state respecting to ground state in more polar solvents.…”