2021
DOI: 10.1021/acs.jpcb.1c03537
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Chromophore Orientation-Dependent Photophysical Properties of Pyrene–Naphthalimide Compact Electron Donor–Acceptor Dyads: Electron Transfer and Intersystem Crossing

Abstract: In order to study the effect of mutual orientation of the chromophores in compact electron donor–acceptor dyads on the spin-orbit charge transfer intersystem crossing (SOCT-ISC), we prepared naphthalimide (NI)–pyrene (Py) compact electron donor–acceptor dyads, in which pyrene acts as an electron donor and NI is an electron acceptor. The connection of the two units is at the 4-C and 3-C positions of the NI unit and the 1-position of the pyrene moiety for dyads NI-Py-1 and NI-Py-2, respectively. A charge transfe… Show more

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Cited by 20 publications
(25 citation statements)
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References 66 publications
(174 reference statements)
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“…Accordingly, the relationship between Φ T and the concentration of Gd 3+ is plotted in Figure b. Φ T increased slightly from 0.53 to 0.67 with Gd 3+ , which can be understood by the effect of external HAE on the spin–orbit coupling (SOC) between S 1 and T 1 , and this is coincident with other reports. , …”
Section: Resultssupporting
confidence: 84%
“…Accordingly, the relationship between Φ T and the concentration of Gd 3+ is plotted in Figure b. Φ T increased slightly from 0.53 to 0.67 with Gd 3+ , which can be understood by the effect of external HAE on the spin–orbit coupling (SOC) between S 1 and T 1 , and this is coincident with other reports. , …”
Section: Resultssupporting
confidence: 84%
“…The effective ISC makes compact electron D-A systems efficient triplet PSs. Thus, chromophores such as anthracene, 33,36 Bodipy, 32,38,39 naphthalimide and naphthalenediimide 37,[40][41][42] have been used for the design of compact D-A dyads undergoing SOCT-ISC as triplet PSs. However, to understand the relationship between the SOCT-ISC efficiency and molecular structures, more examples are needed.…”
Section: Introductionmentioning
confidence: 99%
“…Note that in NI-Ph-PTZ , the electronic coupling between the NI and the phenyl linker is non-negligible, which results in a CT absorption in which the phenyl moiety acts as the donor. This analysis is supported by the UV–vis absorption spectrum of the 3-phenyl NI [ 43 ]. A careful examination of the UV–vis absorption spectra indicates that the PTZ moiety in NI-Ph-PTZ induces a slight redshift of the CT absorption band (centered at 405 nm) as compared to that of 3-phenyl NI [ 43 ].…”
Section: Resultsmentioning
confidence: 86%
“…This analysis is supported by the UV–vis absorption spectrum of the 3-phenyl NI [ 43 ]. A careful examination of the UV–vis absorption spectra indicates that the PTZ moiety in NI-Ph-PTZ induces a slight redshift of the CT absorption band (centered at 405 nm) as compared to that of 3-phenyl NI [ 43 ].…”
Section: Resultsmentioning
confidence: 86%