Long-range photoinduced electron transfer dynamics in rigid media

Ito, Akitaka; Fang, Zhen; Brennaman, M. Kyle; Meyer, Thomas J.

doi:10.1039/c3cp54801e

Cited by 11 publications

(6 citation statements)

References 97 publications

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“…The k r value of 1 was smaller than those of 2 and 3 because of its charge-separated character in the excited state as expected above. Such charge-separated character in the excited state of 1 affords a larger outer-sphere reorganization energy and thus induces efficient thermal deactivation to the ground state . As a result, (dimesitylboryl)phenyl complex 1 shows a larger k nr value than 2 and 3 .…”

Section: Resultsmentioning

confidence: 99%

Controlling the Electronic Structures and Excited-State Characteristics of Dipyrrinatoiridium(III) Complexes by an Arylborane or an Arylamino Unit

et al. 2019

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Novel dipyrrinatoiridium(III) complexes, in which a typical element substituent (i.e., arylborane or arylamino group) was introduced at the meso position of the 5-phenyldipyrrinato ligand, were designed and synthesized. The (dimesitylboryl)phenyl complex 1 showed fascinating photophysical properties arising from a synergistic interaction between metal-to-ligand charge transfer/ligand-to-ligand charge transfer and charge transfer from the π orbital of the aryl group to the vacant p orbital on the boron atom [π(aryl)–p(B) charge transfer]. On the other hand, the (N,N-diphenylamino)phenyl complex 2 showed the most intense and longest-lived emission from the 3ππ*-type excited state in the dipyrrinato moiety among the complexes in the present study. These characteristics of the complexes were evaluated in terms of the structures and spectroscopic and photophysical properties.

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Section: Resultsmentioning

confidence: 99%

Controlling the Electronic Structures and Excited-State Characteristics of Dipyrrinatoiridium(III) Complexes by an Arylborane or an Arylamino Unit

et al. 2019

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“…The damping factor for the distance dependence reported by Cotlet and co-authors is β ≈ 0.1 Å −1 . This is a surprising result, as the linkers are saturated alcyl chains, and typical damping factors for DA systems with saturated alcyl linker are five times larger [38,39]. This may mean that the actual DA distance is shorter than the length of the linker in this case.…”

Section: Qd-molecule Hybridsmentioning

confidence: 94%

“…where d is the distance between the two van der Waals spheres of the donor and acceptor. Typically, β ≈ 5 nm −1 for the so-called "through space" ET; e.g., it was reported to be β ≈ 5.8 nm −1 for a porphyrin-fullerene dyad [38] and β ≈ 4.7 nm −1 for D and A in semi-rigid systems [39].…”

Section: Electronic Factor In Et Ratementioning

confidence: 99%

Effect of the Donor/Acceptor Size on the Rate of Photo-Induced Electron Transfer

Tkachenko

2022

Photochem

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The photo-induced electron transfer has been under intensive investigation for a few decades already, and a good understanding of the reaction was developed based on thorough study of the molecular donor–acceptor (DA) system. The recent shift to hybrid DA systems opens the question of transferring the knowledge to analyze and design these new materials. One of the apparent differences is the size increase of the donor or acceptor entities. The electronic wave functions of larger entities occupy a larger volume, but since these are still one-electron wave functions, their amplitudes are lower. A simple analysis proposed here demonstrates that this leads to roughly inverse third power dependence of the electron transfer rate constant on the donor or acceptor size, kET∝R−3. This dependence can be observed upon switching from molecular to quantum dot donor in DA systems with a fullerene acceptor.

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“…[Ru(bpy) 3 ](PF 6 ) 2 is the same sample which has been used in the earlier literature. − Tetra- n -butylammonium hexafluorophosphate (TBAPF 6 , Wako Pure Chemical Industries) was purified by repeated recrystallizations from ethanol. Ferrocene (Wako Pure Chemical Industries) was used as supplied.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical and Spectroscopic Behaviors of a Novel Ruthenium(II) Complex with a Six-Membered Chelate Structure

Ito

Matsui

2019

Inorg. Chem.

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A novel polypyridyl ruthenium(II) complex with a sixmembered chelate ring ([Ru(dmb) 2 (8pyq)] 2+ ) was designed and synthesized. The oxidation potential was shifted to the negative potential direction, and relatively intense metal-to-ligand charge transfer absorption in the longerwavelength region was observed for [Ru(dmb) 2 (8pyq)] 2+ compared with the reference complexes without any six-membered chelate rings. The electrochemical and spectroscopic properties of [Ru(dmb) 2 (8pyq)] 2+ were discussed in terms of the chelate structure and coordination geometry with utilization of theoretical calculations.

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Long-range photoinduced electron transfer dynamics in rigid media

Cited by 11 publications

References 97 publications

Controlling the Electronic Structures and Excited-State Characteristics of Dipyrrinatoiridium(III) Complexes by an Arylborane or an Arylamino Unit

Controlling the Electronic Structures and Excited-State Characteristics of Dipyrrinatoiridium(III) Complexes by an Arylborane or an Arylamino Unit

Effect of the Donor/Acceptor Size on the Rate of Photo-Induced Electron Transfer

Electrochemical and Spectroscopic Behaviors of a Novel Ruthenium(II) Complex with a Six-Membered Chelate Structure

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