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Liu L, Liu X, Kurganskii I, Chen X, Gurzadyan GG, Zhao J, Wan Y, Fedin M. Charge Transfer and Intersystem Crossing in Compact Naphthalenediimide-Phenothiazine Triads: Synthesis and Study of the Photophysical Property with Transient Optical and Electron Paramagnetic Resonance Spectroscopic Methods. J Phys Chem B 2024; 128:7237-7253. [PMID: 39016740 DOI: 10.1021/acs.jpcb.4c03145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
In order to obtain a long-lived charge separation (CS) state in compact electron donor-acceptor molecular systems, we prepared a series of naphthalenediimide (NDI)-phenothiazine (PTZ) triads, with phenylene as the linker between the donor and acceptor. Conformation restriction is imposed to control the mutual orientation of the NDI and PTZ units by attaching methyl groups on the phenylene linker to tune the electronic coupling between the donor and the acceptor. Moreover, the PTZ moiety was oxidized to sulfoxide to tune the ordering of the CS state and the 3LE state (LE: locally excited state). UV-vis absorption spectra indicate electronic coupling between NDI with the phenylene linker as well as the PTZ units, manifested by the appearance of a charge-transfer (CT) absorption band, whereas this coupling is devoid in the triads with conformation restriction imposed. Fluorescence is strongly quenched in the triads compared to the reference compound, indicating electron transfer upon photoexcitation. Femtosecond transient absorption spectra indicate that the CS takes 0.8 ps, and then the 3LE state is formed by charge recombination in 83 ps. Nanosecond transient absorption (ns-TA) spectra show that the 3NDI state was observed in nonpolar solvents such as cyclohexane (triplet state lifetime: 95.7 μs), whereas the CS state was observed in more polar solvents. The CS state lifetimes are up to 1.2 μs (in toluene). Time-resolved electron paramagnetic resonance spectra of the triads in toluene consist of two types of signals: CS states (narrower signals, ∼10 mT) and 3LE states (broader signals, ∼50 to 200 mT). In the spectra of the triads containing PTZ, the CS state signals dominate, whereas for the triads containing oxidized PTZ, the 3NDI signals (zero-field splitting D ≈ 2000 MHz) prevail, both observations being in agreement with the ns-TA spectral studies. The electron spin polarization phase pattern of the 3NDI states of the triads indicates that the intersystem crossing (ISC) mechanism is spin-orbit charge-transfer ISC. Considering the 3CS state as ion pairs, the electron-exchange energy (J) is determined to be -39 to -59 MHz, and the electron spin dipolar interaction is 83-92 MHz.
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Affiliation(s)
- Lezhang Liu
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Xi Liu
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Ivan Kurganskii
- International Tomography Center, SB RAS, Institutskaya Street, 3A, Novosibirsk 630090, Russia
| | - Xi Chen
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Gagik G Gurzadyan
- State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, Dalian University of Technology, Dalian 116024, P. R. China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China
| | - Yan Wan
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Matvey Fedin
- International Tomography Center, SB RAS, Institutskaya Street, 3A, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia
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Li X, Wang X, Zhang Q, Wu Z, Zhang K, Song Y, Fan J, Wang CK, Lin L. Theoretical study on thermally activated delayed fluorescent molecules based on space charge transfer. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 288:122131. [PMID: 36455466 DOI: 10.1016/j.saa.2022.122131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 10/13/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
Thermally Activated Delayed Fluorescent (TADF) molecules with through-space charge transfer (TSCT) have broad application potential in organic light-emitting diodes. In this paper, five TPA-ace based molecules with different electron-withdrawing groups and TSCT property are investigated using polarizable continuum model (PCM) combined with density functional theory (DFT) and time-dependent functional theory (TD-DFT) in Methylcyclohexane, Toluene and Dichloromethane. It is found that stronger electron-withdrawing ability of acceptors could induce redshift of emission and smaller energy gap between the first singlet excited state (S1) and the first triplet excited state (ΔEST). The ratio of TSCT to through bond charge transfer (TBCT) for S1 of TPA-ace-TRZ is calculated quantitatively, which further confirmed the TSCT character of TPA-ace-TRZ. The TADF property is also analyzed based on the calculation of spin-orbit coupling and the (reverse) intersystem crossing rates between S1 and T1. Our calculation results would favor the understanding of TSCT-TADF.
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Affiliation(s)
- Xiaofang Li
- Shandong Key Laboratory of Medical Physics and Image Processing & Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Xiaofei Wang
- Shandong Key Laboratory of Medical Physics and Image Processing & Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Qun Zhang
- Shandong Key Laboratory of Medical Physics and Image Processing & Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Zhimin Wu
- Shandong Key Laboratory of Medical Physics and Image Processing & Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Kai Zhang
- Shandong Key Laboratory of Medical Physics and Image Processing & Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Yuzhi Song
- Shandong Key Laboratory of Medical Physics and Image Processing & Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Jianzhong Fan
- Shandong Key Laboratory of Medical Physics and Image Processing & Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China
| | - Chuan-Kui Wang
- Shandong Key Laboratory of Medical Physics and Image Processing & Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China.
| | - Lili Lin
- Shandong Key Laboratory of Medical Physics and Image Processing & Manipulations, School of Physics and Electronics, Shandong Normal University, Jinan 250358, China.
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Marchetti D, Portone F, Mezzadri F, Dalcanale E, Gemmi M, Pedrini A, Massera C. Selective and Reversible Solvent Uptake in Tetra-4-(4-pyridyl)phenylmethane-based Supramolecular Organic Frameworks. Chemistry 2022; 28:e202202977. [PMID: 36161363 PMCID: PMC10092063 DOI: 10.1002/chem.202202977] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Indexed: 12/29/2022]
Abstract
The dynamic behavior of supramolecular organic frameworks (SOFs) based on the rigid tetra-4-(4-pyridyl)phenylmethane (TPPM) organic tecton has been elucidated through 3D electron diffraction, X-ray powder diffraction and differential scanning calorimetry (DSC) analysis. The SOF undergoes a reversible single-crystal-to-single-crystal transformation when exposed to vapours of selected organic solvents, moving from a closed structure with isolated small voids to an expanded structure with solvated channels along the b axis. The observed selectivity is dictated by the fitting of the guest in the expanded SOF, following the degree of packing coefficient. The effect of solvent uptake on TPPM solid-state fluorescence was investigated, evidencing a significant variation in the emission profile only in the presence of chloroform.
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Affiliation(s)
- Danilo Marchetti
- Department of Chemistry, Life Sciences and Environmental Sustainability INSTM UdR Parma, University of Parma, Parco Area delle Scienze 17/A, 43124, Parma, Italy.,Center for Materials Interfaces Electron Crystallography, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025, Pontedera, Italy
| | - Francesca Portone
- Department of Chemistry, Life Sciences and Environmental Sustainability INSTM UdR Parma, University of Parma, Parco Area delle Scienze 17/A, 43124, Parma, Italy
| | - Francesco Mezzadri
- Department of Chemistry, Life Sciences and Environmental Sustainability INSTM UdR Parma, University of Parma, Parco Area delle Scienze 17/A, 43124, Parma, Italy
| | - Enrico Dalcanale
- Department of Chemistry, Life Sciences and Environmental Sustainability INSTM UdR Parma, University of Parma, Parco Area delle Scienze 17/A, 43124, Parma, Italy
| | - Mauro Gemmi
- Center for Materials Interfaces Electron Crystallography, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025, Pontedera, Italy
| | - Alessandro Pedrini
- Department of Chemistry, Life Sciences and Environmental Sustainability INSTM UdR Parma, University of Parma, Parco Area delle Scienze 17/A, 43124, Parma, Italy
| | - Chiara Massera
- Department of Chemistry, Life Sciences and Environmental Sustainability INSTM UdR Parma, University of Parma, Parco Area delle Scienze 17/A, 43124, Parma, Italy
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Song K, Wang J, Feng L, He F, Yin Y, Yang J, Song Y, Zhang Q, Ru X, Lan Y, Zhang G, Yao H. Thermochromic Phosphors Based on One‐Dimensional Ionic Copper‐Iodine Chains Showing Solid‐State Photoluminescence Efficiency Exceeding 99 %. Angew Chem Int Ed Engl 2022; 61:e202208960. [DOI: 10.1002/anie.202208960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Kuang‐Hui Song
- Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
- Department of Applied Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Jing‐Jing Wang
- Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
- Department of Applied Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Li‐Zhe Feng
- Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
- Department of Applied Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Fuxiang He
- CAS Key Laboratory of Quantum Information University of Science and Technology of China Hefei Anhui 230026 China
| | - Yi‐Chen Yin
- Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
- Department of Applied Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Jun‐Nan Yang
- Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
- Department of Applied Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Yong‐Hui Song
- Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
- Department of Applied Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Qian Zhang
- Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
- Department of Applied Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Xue‐Chen Ru
- Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
- Department of Applied Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Yi‐Feng Lan
- Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
- Department of Applied Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Guozhen Zhang
- Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
- Department of Chemical Physics iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) University of Science and Technology of China Hefei Anhui 230026 China
| | - Hong‐Bin Yao
- Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
- Department of Applied Chemistry University of Science and Technology of China Hefei Anhui 230026 China
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Song KH, Wang JJ, Feng LZ, He F, Yin YC, Yang JN, Song YH, Zhang Q, Ru XC, Lan YF, Zhang G, Yao HB. Thermochromic Phosphors Based on One‐Dimensional Ionic Copper‐Iodine Chains Showing Solid‐State Photoluminescence Efficiency Exceeding 99%. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kuang-Hui Song
- University of Science and Technology of China Appiled Chemistry CHINA
| | - Jing-Jing Wang
- University of Science and Technology of China Appiled Chemistry CHINA
| | - Li-Zhe Feng
- University of Science and Technology of China Appiled Chemistry CHINA
| | - Fuxiang He
- University of Science and Technology of China CAS Key Laboratory of Quantum Information CHINA
| | - Yi-Chen Yin
- University of Science and Technology of China Appiled Chemistry CHINA
| | - Jun-Nan Yang
- University of Science and Technology of China Appiled Chemistry CHINA
| | - Yong-Hui Song
- University of Science and Technology of China Appiled Chemistry CHINA
| | - Qian Zhang
- University of Science and Technology of China Appiled Chemistry CHINA
| | - Xue-Chen Ru
- University of Science and Technology of China Hefei National Research Center for Physical Sciences at the Microscale CHINA
| | - Yi-Feng Lan
- University of Science and Technology of China Appiled Chemistry CHINA
| | - Guozhen Zhang
- University of Science and Technology of China Chemical Physics CHINA
| | - Hong-Bin Yao
- University of Science and Technology of China Chemistry 96 Jinzhai Road 230026 Hefei CHINA
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