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Wang XF, Xiao H, Chen PZ, Yang QZ, Chen B, Tung CH, Chen YZ, Wu LZ. Pure Organic Room Temperature Phosphorescence from Excited Dimers in Self-Assembled Nanoparticles under Visible and Near-Infrared Irradiation in Water. J Am Chem Soc 2019; 141:5045-5050. [PMID: 30827093 DOI: 10.1021/jacs.9b00859] [Citation(s) in RCA: 167] [Impact Index Per Article: 33.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Pure organic room temperature phosphorescence (RTP) has unique advantages and various potential applications. However, it is challengeable to achieve organic RTP under visible and near-infrared (NIR)-light excitation, especially in aqueous solution. Herein we assemble difluoroboron β-diketonate compounds to form organic nanoparticles (NPs) in water. The resulting NPs are able to show efficient RTP, effective uptake, and bright imaging of HeLa cells under both visible- and NIR-light excitation. More strikingly, spectroscopic study, single-crystal X-ray diffraction, and DFT calculation reveal that the efficient RTP in organic NPs is originated from dimers in their excited states. The multiple interactions and intermolecular charge transfer in the dimer structures are of significance in promoting the production of dimer triplet excited states and suppressing the nonradiative decays to boost the RTP under visible- and NIR-light irradiation in water.
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Affiliation(s)
- Xiao-Fang Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials , Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.,School of Future Technology , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Hongyan Xiao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials , Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.,School of Future Technology , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Peng-Zhong Chen
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry , Beijing Normal University , Beijing 100875 , China
| | - Qing-Zheng Yang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry , Beijing Normal University , Beijing 100875 , China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials , Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.,School of Future Technology , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials , Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.,School of Future Technology , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Yu-Zhe Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials , Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.,School of Future Technology , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials , Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.,School of Future Technology , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
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Singh A, Pati AK, Mishra AK. Photophysical Impact of Diacetylenic Conjugation on Classical Donor–Acceptor Electronic Energy Pair. J Phys Chem A 2019; 123:443-453. [DOI: 10.1021/acs.jpca.8b09689] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Anuja Singh
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India
| | - Avik Kumar Pati
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India
| | - Ashok Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India
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Stîngă G, Băran A, Iovescu A, Aricov L, Anghel DF. Monitoring the confinement of methylene blue in pyrene labeled poly(acrylic acid). J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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