1
|
Tian W, Sukhanov AA, Bussotti L, Pang J, Zhao J, Voronkova VK, Di Donato M, Li MD. Charge Separation and Intersystem Crossing in Homo- and Hetero-Compact Naphthalimide Dimers. J Phys Chem B 2022; 126:4364-4378. [PMID: 35649261 DOI: 10.1021/acs.jpcb.2c02276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Naphthalimide (NI) homo- and hetero-dimers adopting orthogonal geometry were prepared to study photo-induced symmetry-breaking charge transfer (SBCT) and charge recombination (CR)-induced intersystem crossing (ISC). The two moieties in the dimer are connected either at the 3-C or 4-C position of the NI unit. The photophysical properties of the dimers were studied with steady-state and transient absorption spectroscopic methods. Significant CT only occurs for the hetero-dimer, in which one NI unit has a 4-amino substituent and the other NI unit is without it. The CR-induced ISC is most efficient for this dimer (singlet oxygen quantum yield ΦΔ = 50.3%). For the homo-dimer, in which both NI units did not present amino substitution, SBCT was not observed. Based on the electrochemical studies, we propose that the absence of SBCT for the homo-dimer is attributed to its high oxidation potential and low reduction potential. Femtosecond transient absorption (fs TA) spectra show that there is no charge separation (CS) for the homo-dimer. Nanosecond transient absorption spectroscopy indicate the formation of a triplet state with electron delocalization for the homo dimer, with a lifetime of 72.0 μs, while for the hetero dimer a triplet state with an intrinsic lifetime of 206.4 μs is observed. CS (11.6 ps) and slow CR-induced ISC (>1.5 ns) were observed for the hetero-dimer. Time-resolved electron paramagnetic resonance spectra give the zero-field splitting parameters (|D| = 1894 MHz and |E| = 111 MHz) and electron spin polarization patterns (e, e, e, a, a, a) for the triplet state of the hetero-dimer, inferring that the triplet state of the hetero-dimer is confined on the amino-substituted NI moiety.
Collapse
Affiliation(s)
- Wen Tian
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Andrey A Sukhanov
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of Russian Academy of Sciences, Kazan 420029, Russia
| | - Laura Bussotti
- LENS (European Laboratory for Non-Linear Spectroscopy), via N. Carrara 1, Sesto Fiorentino (FI) 50019, Italy
| | - Junhong Pang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou 515063, P. R. China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, P. R. China
| | - Violeta K Voronkova
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of Russian Academy of Sciences, Kazan 420029, Russia
| | - Mariangela Di Donato
- LENS (European Laboratory for Non-Linear Spectroscopy), via N. Carrara 1, Sesto Fiorentino (FI) 50019, Italy
- ICCOM-CNR, via Madonna del Piano 10, Sesto Fiorentino (FI) 50019, Italy
| | - Ming-De Li
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou 515063, P. R. China
| |
Collapse
|
2
|
Das S, Thornbury WG, Bartynski AN, Thompson ME, Bradforth SE. Manipulating Triplet Yield through Control of Symmetry-Breaking Charge Transfer. J Phys Chem Lett 2018; 9:3264-3270. [PMID: 29847949 DOI: 10.1021/acs.jpclett.8b01237] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The efficiency of an organic solar cell depends on the efficacy of exciton diffusion and dissociation processes, and this can be enhanced by reducing the exciton binding energy and increasing the exciton lifetime. Zinc chlorodipyrrin (ZCl) complexes exhibit reduced exciton binding energy due to ultrafast generation of intramolecular charge transfer (ICT) states via symmetry-breaking charge transfer in polar media. This Letter explores the fate of the ICT states using nanosecond transient absorption. In cyclohexane, ZCl undergoes intersystem crossing to produce triplets with ∼8 ns time constant (∼30% yield), and no ICT states are generated. However, in more polar solvents, triplets are generated within 1 ns via ICT state recombination with ∼3 times higher yield than produced via ISC. This high triplet yield in toluene (89%) and acetonitrile (76%) via ICT state recombination is a beneficial pathway to spin-protect the excited-state decay for additional charge generation from triplet excited states.
Collapse
Affiliation(s)
- Saptaparna Das
- Department of Chemistry , University of Southern California , Los Angeles , California 90089 , United States
| | - William G Thornbury
- Department of Chemical Engineering , University of Southern California , Los Angeles , California 90089 , United States
| | - Andrew N Bartynski
- Department of Chemical Engineering , University of Southern California , Los Angeles , California 90089 , United States
| | - Mark E Thompson
- Department of Chemistry , University of Southern California , Los Angeles , California 90089 , United States
| | - Stephen E Bradforth
- Department of Chemistry , University of Southern California , Los Angeles , California 90089 , United States
| |
Collapse
|
3
|
Kim D. A Theoretical Study of Benzene Dimers in the Excited States: Wavefunction Delocalization, Charge-Transfer Admixture, and Electronic Coupling. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11168] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dongwook Kim
- Department of Chemistry; Kyonggi University; Suwon 440-760 Korea
| |
Collapse
|
4
|
Vaishnav JK, Mukherjee TK. Tuning of resonance energy transfer from 4′,6-diamidino-2-phenylindole to an ultrasmall silver nanocluster across the lipid bilayer. Phys Chem Chem Phys 2017; 19:27305-27312. [DOI: 10.1039/c7cp05225a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Liposome mediated efficient tuning of FRET between photoexcited 4′,6-diamidino-2-phenylindole (DAPI) and an ultrasmall silver nanocluster (Ag NC) has been demonstrated using steady-state and time-resolved fluorescence spectroscopy.
Collapse
Affiliation(s)
- Jamuna K. Vaishnav
- Discipline of Chemistry
- Indian Institute of Technology Indore
- Indore-453552
- India
| | | |
Collapse
|
5
|
Prajapati R, Chatterjee S, Kannaujiya KK, Mukherjee TK. Effect of compartmentalization of donor and acceptor on the ultrafast resonance energy transfer from DAPI to silver nanoclusters. NANOSCALE 2016; 8:13006-13016. [PMID: 27304093 DOI: 10.1039/c6nr01792d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The mechanism and dynamics of excitation energy transfer (EET) from photo-excited 4',6-diamidino-2-phenylindole (DAPI) to silver nanoclusters (Ag NCs) and its subsequent modulation in the presence of cationic polymer poly(diallyldimethylammonium chloride) (PDADMAC) and Calf Thymus DNA (CT-DNA) have been demonstrated using steady-state fluorescence and femtosecond fluorescence upconversion techniques. The synthesized Ag NCs were characterized using FTIR, mass spectrometry, XPS, HRTEM, DLS, UV-Vis and PL spectroscopy. Mass spectrometric analysis reveals the formation of ultrasmall Ag4 NCs with a small amount of Ag5 NCs. UV-Vis and PL spectra reveal distinct molecular-like optoelectronic behaviour of these ultrasmall Ag NCs. The dihydrolipoic acid-capped Ag NCs strongly quench the fluorescence of DAPI with concomitant increase in its photoluminescence (PL) intensity at 675 nm. This steady-state fluorescence quenching proceeds with a significant shortening of the fluorescence lifetime of DAPI in the presence of Ag NCs, signifying the nonradiative Förster resonance energy transfer (FRET) from DAPI to Ag NCs. Various energy transfer parameters have been estimated from FRET theory. The present FRET pair shows a characteristic Förster distance of 2.45 nm and can be utilized as a reporter of short-range distances in various FRET based applications. Moreover, this nonradiative FRET is completely suppressed in the presence of both 0.2 wt% PDADMAC and CT-DNA. Our results reveal selective compartmentalization of Ag NCs and DAPI in the presence of 0.2 wt% PDADMAC and CT-DNA, respectively. This selective compartmentalization of donor and acceptor and the subsequent modification of the FRET process may find application in various sensing, photovoltaic, and light harvesting applications.
Collapse
Affiliation(s)
- Roopali Prajapati
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol Campus, Khandwa Road, Indore-453552, M.P., India.
| | | | | | | |
Collapse
|
6
|
Bartynski AN, Gruber M, Das S, Rangan S, Mollinger S, Trinh C, Bradforth SE, Vandewal K, Salleo A, Bartynski RA, Bruetting W, Thompson ME. Symmetry-Breaking Charge Transfer in a Zinc Chlorodipyrrin Acceptor for High Open Circuit Voltage Organic Photovoltaics. J Am Chem Soc 2015; 137:5397-405. [DOI: 10.1021/jacs.5b00146] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Mark Gruber
- Institute
for Physics, Augsburg University, 86135 Augsburg, Germany
| | | | - Sylvie Rangan
- Department
of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Sonya Mollinger
- Department
of Materials Science and Engineering, Stanford University, Palo Alto, California 94305, United States
| | | | | | - Koen Vandewal
- Department
of Materials Science and Engineering, Stanford University, Palo Alto, California 94305, United States
| | - Alberto Salleo
- Department
of Materials Science and Engineering, Stanford University, Palo Alto, California 94305, United States
| | - Robert A. Bartynski
- Department
of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, United States
| | | | | |
Collapse
|
7
|
Liu B, Fang H, Li X, Cai W, Bao L, Rudolf M, Plass F, Fan L, Lu X, Guldi DM. Synthesis and Photophysical Properties of a Sc3N@C80-Corrole Electron Donor-Acceptor Conjugate. Chemistry 2014; 21:746-52. [DOI: 10.1002/chem.201405572] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Indexed: 11/12/2022]
|
8
|
Wu H, Fan S, Jin X, Zhang H, Chen H, Dai Z, Zou X. Construction of a Zinc Porphyrin–Fullerene-Derivative Based Nonenzymatic Electrochemical Sensor for Sensitive Sensing of Hydrogen Peroxide and Nitrite. Anal Chem 2014; 86:6285-90. [DOI: 10.1021/ac500245k] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Hai Wu
- College of Chemistry & Chemical Engineering, Fuyang Normal College, Fuyang, Anhui 236037, P.R. China
- School
of Chemistry
and Chemical Engineering, Sun Yat−Sen University, Guangzhou 510275, P.R. China
| | - Suhua Fan
- College of Chemistry & Chemical Engineering, Fuyang Normal College, Fuyang, Anhui 236037, P.R. China
| | - Xiaoyan Jin
- College of Chemistry & Chemical Engineering, Fuyang Normal College, Fuyang, Anhui 236037, P.R. China
| | - Hong Zhang
- College of Chemistry & Chemical Engineering, Fuyang Normal College, Fuyang, Anhui 236037, P.R. China
| | - Hong Chen
- College of Chemistry & Chemical Engineering, Fuyang Normal College, Fuyang, Anhui 236037, P.R. China
| | - Zong Dai
- School
of Chemistry
and Chemical Engineering, Sun Yat−Sen University, Guangzhou 510275, P.R. China
| | - Xiaoyong Zou
- School
of Chemistry
and Chemical Engineering, Sun Yat−Sen University, Guangzhou 510275, P.R. China
| |
Collapse
|