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Asthana S, Mouli MSSV, Tamrakar A, Wani MA, Mishra AK, Pandey R, Pandey MD. Recent advances in AIEgen-based chemosensors for small molecule detection, with a focus on ion sensing. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:4431-4484. [PMID: 38913433 DOI: 10.1039/d4ay00618f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Since the aggregation-based emission (AIE) phenomenon emerged in 2001, numerous chemical designs have been built around the AIE concept, displaying its utility for diverse applications, including optics, electronics, energy, and biosciences. The present review critically evaluates the broad applicability of AIEgen-based chemical models towards sensing small analytes and the structural design strategies adjusting the mode of action reported since the last decade. Various AIEgen models have been discussed, providing qualitative and quantitative estimation of cationic metal ions and anionic species, as well as biomolecular, cellular, and organelle-specific probes. A systematic overview of the reported structural design and the underlying working mode will pave the way for designing and developing the next generation of AIEgens for specific applications.
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Affiliation(s)
- Surabhi Asthana
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
| | - M S S Vinod Mouli
- Department of Chemistry, Indian Institute of Technology Hyderabad, Sangareddy-502285, India.
| | - Arpna Tamrakar
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
| | - Manzoor Ahmad Wani
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
| | - Ashutosh Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Hyderabad, Sangareddy-502285, India.
| | - Rampal Pandey
- Department of Chemistry, Maulana Azad National Institute of Technology, Bhopal-462007, India.
| | - Mrituanjay D Pandey
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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2
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Akram MO, Martin CD, Dutton JL. The Effect of Carborane Substituents on the Lewis Acidity of Boranes. Inorg Chem 2023; 62:13495-13504. [PMID: 37560972 DOI: 10.1021/acs.inorgchem.3c01872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
The Lewis acidity of primary, secondary, and tertiary boranes with phenyl, pentafluorophenyl, and all three isomers of the C-substituted icosahedral carboranes (ortho, meta, and para) was investigated by computing their fluoride, hydride, and ammonia affinities as well as their global electrophilicity indices and LUMO energies. From these calculations, it was determined that the substituent effects on the Lewis acidity of these boranes follow the trend of ortho-carborane > meta-carborane > para-carborane > C6F5 > C6H5.
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Affiliation(s)
- Manjur O Akram
- Baylor University, Department of Chemistry and Biochemistry, One Bear Place #97348, Waco, Texas 76798, United States
| | - Caleb D Martin
- Baylor University, Department of Chemistry and Biochemistry, One Bear Place #97348, Waco, Texas 76798, United States
| | - Jason L Dutton
- La Trobe University, Department of Chemistry, La Trobe Institute for Molecular Science, Melbourne, Victoria 3086,Australia
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3
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You DK, Kim M, Kim D, Kim N, Lee KM. Improvement in Radiative Efficiency Via Intramolecular Charge Transfer in ortho-Carboranyl Luminophores Modified with Functionalized Biphenyls. Inorg Chem 2023. [PMID: 37311712 DOI: 10.1021/acs.inorgchem.3c01242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this study, we found that the electronic effects of the functional groups on aromatic units attached to o-carboranyl species can enhance the efficiency of intramolecular charge transfer (ICT)-based radiative decay processes. Six o-carboranyl-based luminophores having attached functionalized biphenyl groups with CF3, F, H, CH3, C(CH3)3, and OCH3 substituents were prepared and fully characterized by multinuclear magnetic resonance spectroscopy. In addition, their molecular structures were determined by single-crystal X-ray diffractometry, which revealed that the distortion of the biphenyl rings and the geometries around the o-carborane cages were similar. All compounds exhibited ICT-based emissions in the rigid state (solution at 77 K and film). Intriguingly, the quantum efficiencies (Φem) of five compounds (that of the group with CF3 could not be measured because of its extremely weak emissions) in the film state increased gradually as the electron-donating power of the terminal functional group modifying the biphenyl moiety increased. Furthermore, the nonradiative decay constants (knr) for the group with OCH3 were estimated to be one-tenth of those for the group with F, whereas the radiative decay constants (kr) for the five compounds were similar. The dipole moments (μ) calculated for the optimized first excited state (S1) structures gradually increased, from that of the group with CF3 to that of the group with OCH3, implying that the inhomogeneity of the molecular charge distribution was enhanced by electron donation. The electron-rich environment formed as a result of electron donation led to efficient charge transfer to the excited state. Both experimental and theoretical findings revealed that the electronic environment of the aromatic moiety in o-carboranyl luminophores can be controlled to accelerate or interrupt the ICT process in the radiative decay of excited states.
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Affiliation(s)
- Dong Kyun You
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Mingi Kim
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Dongwook Kim
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Namkyun Kim
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
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4
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Zhang YF, Zhang YW, Li X, Sun LY, Han YF. Synthesis of triarylborane-centered N-heterocyclic carbene cages with tunable photophysical properties. Chem Commun (Camb) 2023; 59:2291-2294. [PMID: 36744641 DOI: 10.1039/d2cc06584c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Triarylborane-based discrete metal-carbene supramolecular cages [M3(1)2](PF6)3 (M = Ag, Au) were synthesized and characterized. The new hexacarbene assemblies show a significant solvatochromic effect in solvents of different polarity. Furthermore, the reversible fluoride binding property of [Au3(1)2](PF6)3 was investigated by UV-vis absorption and fluorescence titrations. This work holds promise for future developments in the area of highly emissive and stimulus-responsive NHC-metal assemblies.
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Affiliation(s)
- Yi-Fan Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Functional Supramolecular Structure and Materials, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China.
| | - Ya-Wen Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Functional Supramolecular Structure and Materials, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China.
| | - Xin Li
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Functional Supramolecular Structure and Materials, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China.
| | - Li-Ying Sun
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Functional Supramolecular Structure and Materials, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China.
| | - Ying-Feng Han
- Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, Xi'an Key Laboratory of Functional Supramolecular Structure and Materials, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, P. R. China.
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5
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Kim M, Ryu CH, You DK, Hong JH, Lee KM. Crucial Factors Regulating Intramolecular Charge-Transfer-Based Radiative Efficiency in ortho-Carboranyl Luminophores: Planarity between Substituted Biphenyl Rings. ACS OMEGA 2022; 7:24027-24039. [PMID: 35847313 PMCID: PMC9281304 DOI: 10.1021/acsomega.2c03344] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
o-Carboranyl compounds contain specific geometries, ranging from planar to orthogonally distorted biphenyl rings. Herein, 13 o-carboranyl compounds, 1HF-13PP, were synthesized and fully characterized to determine the impact of structural formation of the aromatic group appended with the o-carborane to estimate the efficiency of their radiative decay process. All the compounds exhibited significant intramolecular charge transfer (ICT)-based emission in the crystalline state at 298 K. Remarkably, increasing the distorted dihedral angles between biphenyl rings gradually decreased the emission efficiencies. Furthermore, their radiative decay constants decreased linearly with increasing dihedral angles, which demonstrated the inversely proportional relationship between these two factors. These findings distinctly suggest that the planar or distorted geometry of substituted aryl groups can strongly affect the efficiency of the ICT-based radiative process in o-carboranyl luminophores.
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Ryu CH, Lee SH, Yi S, Hong JH, Im S, Lee KM. Naphthyl‐ and Quinoline‐Appended
o
‐Carboranyl Luminophores: Intramolecular Charge Transfer‐Based Radiative Decay Controlled by Structural Geometry around C−C Bond Axis. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100768] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chan Hee Ryu
- Department of Chemistry Institute for Molecular Science and Fusion Technology Kangwon National University Chuncheon, Gangwon 24341 Republic of Korea
| | - Seok Ho Lee
- Department of Chemistry Institute for Molecular Science and Fusion Technology Kangwon National University Chuncheon, Gangwon 24341 Republic of Korea
| | - Sanghee Yi
- Department of Chemistry Institute for Molecular Science and Fusion Technology Kangwon National University Chuncheon, Gangwon 24341 Republic of Korea
| | - Ju Hyun Hong
- Department of Chemistry Institute for Molecular Science and Fusion Technology Kangwon National University Chuncheon, Gangwon 24341 Republic of Korea
| | - Sehee Im
- Department of Chemistry Institute for Molecular Science and Fusion Technology Kangwon National University Chuncheon, Gangwon 24341 Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry Institute for Molecular Science and Fusion Technology Kangwon National University Chuncheon, Gangwon 24341 Republic of Korea
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7
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Gu P, Wu H, Jing T, Li Y, Wang Z, Ye S, Lai W, Ferbinteanu M, Wang S, Huang W. (4,5,8)-Connected Cationic Coordination Polymer Material as Explosive Chemosensor Based on the in Situ Generated AIE Tetrazolyl-Tetraphenylethylene Derivative. Inorg Chem 2021; 60:13359-13365. [PMID: 34492766 DOI: 10.1021/acs.inorgchem.1c01623] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A multidentate tetrazole molecule based on a TPE core, tetrakis[4-(1H-tetrazol-5-yl)phenyl]ethylene (H4ttpe) with combined advantages of two functional groups, was synthesized by cycloaddition reaction of the corresponding organic benzonitrile derivative and azide salt. Coordination self-assembly of the in situ formed aggregation-induced emission polytetrazole luminogen with cadmium(II) ion produces an unprecedented tetrazolyl-TPE-based microporous cationic metal-organic framework (MOF) with an unusual (4,5,8T14)-connected net of {[Cd4(H4ttpe)2Cl5]·(N3)3}, in which the H4ttpe serves as the first undeprotonated tetrazole ligand of octa-coordinating bridging mode. We investigate, for the first time, the utilization of the luminescent MOF containing a TPE core decorated with tetrazolyl terminals for explosive detection based on the change in fluorescence intensity, which shows high selectivity and efficiency in fluorescence quenching toward TNP detection in water solution.
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Affiliation(s)
- Pengfei Gu
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, People's Republic of China
| | - Huayu Wu
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, People's Republic of China
| | - Tongtong Jing
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, People's Republic of China
| | - Yonghua Li
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, People's Republic of China
| | - Zikun Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, People's Republic of China
| | - Shanghui Ye
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, People's Republic of China
| | - Wenyong Lai
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, People's Republic of China
| | - Marilena Ferbinteanu
- Faculty of Chemistry, University of Bucharest, Dumbrava Rosie 23, Bucharest 020462, Romania
| | - Shi Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, People's Republic of China
| | - Wei Huang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, People's Republic of China
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8
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Lee SH, Mun MS, Kim M, Lee JH, Hwang H, Lee W, Lee KM. Alteration of intramolecular electronic transition via deboronation of carbazole-based o-carboranyl compound and intriguing 'turn-on' emissive variation. RSC Adv 2021; 11:24057-24064. [PMID: 35479040 PMCID: PMC9036662 DOI: 10.1039/d1ra03716a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 07/05/2021] [Indexed: 01/10/2023] Open
Abstract
The conversion of closo-o-carborane–containing compounds to the nido-o-species via deboronation causes photophysical changes that could be used for sensing applications. 9-Methyl-9H-carbazole–based closo- (closo-Cz) and nido-o-carboranyl (nido-Cz) compounds were prepared and fully characterised by multinuclear NMR spectroscopy and elemental analysis, and the solid-state molecular structure of closo-Cz was analysed by X-ray crystallography. Although the closo-compound exhibited an emissive pattern centred at λem = ca. 530 nm in the rigid state only (in THF at 77 K and as a film), nido-Cz demonstrated intense emission in the near-UV region (λem = ca. 380 nm) in both solution and film states at 298 K. The positive solvatochromic effect of nido-Cz and the results of theoretical calculations for both the o-carboranyl compounds supported that these emissive features originate from intramolecular charge transfer (ICT) corresponding to the o-carborane. Furthermore, the calculations verified that the electronic role of the o-carboranyl unit changed from acceptor to donor upon deboronation from closo-Cz to nido-Cz. Investigations of the radiative decay mechanisms of closo-Cz and nido-Cz according to their quantum efficiencies (Φem) and decay lifetimes (τobs) suggested that the ICT-based radiative decays of closo-Cz and nido-Cz readily occur in the film (solid) and solution state, respectively. These observations implied that the emission of closo-Cz in the solution state could be drastically enhanced by deboronation to nido-Cz upon exposure to an increasing concentration of fluoride anions. Indeed, turn-on emissive features in an aqueous solution were observed upon deboronation, strongly suggesting the potential of closo-Cz as a turn-on and visually detectable chemodosimeter for fluoride ion sensing. Deboronation of a 9-methyl-9H-carbazole–based closo-o-carboranyl compound to the nido-o-carborane in an aqueous solution results in a ratiometric turn-on response in the deep-blue emission region with moderate reactivity.![]()
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Affiliation(s)
- Seok Ho Lee
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Min Sik Mun
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Mingi Kim
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Ji Hye Lee
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Hyonseok Hwang
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Wonchul Lee
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
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9
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You DK, So H, Ryu CH, Kim M, Lee KM. Strategic molecular design of closo-ortho-carboranyl luminophores to manifest thermally activated delayed fluorescence. Chem Sci 2021; 12:8411-8423. [PMID: 34221322 PMCID: PMC8221186 DOI: 10.1039/d1sc00791b] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 05/11/2021] [Indexed: 11/22/2022] Open
Abstract
In this paper, we propose a strategic molecular design of closo-o-carborane-based donor-acceptor dyad system that exhibits thermally activated delayed fluorescence (TADF) in the solution state at ambient temperature. Planar 9,9-dimethyl-9H-fluorene-based compounds with closo- and nido-o-carborane cages appended at the C2-, C3-, and C4-positions of each fluorene moiety (closo-type: 2FC, 3FC, 4FC, and 4FCH, and nido-type: nido-4FC = [nido-form of 4FC]·[NBu4]) were prepared and characterized. The solid-state molecular structure of 4FC exhibited a significantly distorted fluorene plane, which suggests the existence of severe intramolecular steric hindrance. In photoluminescence measurements, 4FC exhibits a noticeable intramolecular charge transition (ICT)-based emission in all states (solution at 298 K and 77 K, and solid states); however, emissions by other closo-compounds were observed in only the rigid state (solution at 77 K and film). Furthermore, nido-4FC did not exhibit emissive traces in any state. These observations verify that all radiative decay processes correspond to ICT transitions triggered by closo-o-carborane, which acts as an electron acceptor. Relative energy barriers calculated by TD-DFT as dihedral angles around o-carborane cages change in closo-compounds, which indicates that the structural formation of 4FC is nearly fixed around its S0-optimized structure. This differs from that for other closo-compounds, wherein the free rotation of their o-carborane cages occurs easily at ambient temperature. Such rigidity in the structural geometry of 4FC results in ICT-based emission in solution at 298 K and enhancement of quantum efficiency and radiative decay constants compared to those for other closo-compounds. Furthermore, 4FC displays short-lived (∼0.5 ns) and long-lived (∼30 ns) PL decay components in solution at 298 K and in the film state, respectively, which can be attributed to prompt fluorescence and TADF, respectively. The calculated energy difference (ΔE ST) between the first excited singlet and triplet states of the closo-compounds demonstrate that the TADF characteristic of 4FC originates from a significantly small ΔE ST maintained by the rigid structural fixation around its S0-optimized structure. Furthermore, the strategic molecular design of the o-carborane-appended π-conjugated (D-A) system, which forms a rigid geometry due to severe intramolecular steric hindrance, can enhance the radiative efficiency for ICT-based emission and trigger the TADF nature.
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Affiliation(s)
- Dong Kyun You
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Hyunhee So
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Chan Hee Ryu
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Mingi Kim
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University Chuncheon Gangwon 24341 Republic of Korea
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10
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Lee SH, Mun MS, Lee JH, Im S, Lee W, Hwang H, Lee KM. Impact of the Electronic Environment in Carbazole-Appended o-Carboranyl Compounds on the Intramolecular-Charge-Transfer-Based Radiative Decay Efficiency. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00060] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Seok Ho Lee
- Department of Chemistry and Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Min Sik Mun
- Department of Chemistry and Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Ji Hye Lee
- Department of Chemistry and Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Sehee Im
- Department of Chemistry and Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Wonchul Lee
- Department of Chemistry and Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Hyonseok Hwang
- Department of Chemistry and Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry and Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
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11
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Kim M, Im S, Ryu CH, Lee SH, Hong JH, Lee KM. Impact of deboronation on the electronic characteristics of closo-o-carborane: intriguing photophysical changes in triazole-appended carboranyl luminophores. Dalton Trans 2021; 50:3207-3215. [PMID: 33576753 DOI: 10.1039/d0dt04038j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
5-Phenyl-1,2,4-triazole-appended closo- (CB1 and CB2) and nido-o-carboranyl (nido-CB1 and nido-CB2) compounds were prepared and fully characterized using multinuclear NMR spectroscopy and elemental analysis. The solid-state molecular structures of both closo-compounds were analyzed by X-ray crystallography. Although the closo-compounds exhibited dual emissive patterns in the rigid state (in THF at 77 K), which were assignable to a π-π* local excitation (LE)-based emission (λem = ca. 380 nm) on the triazole moieties and to an intramolecular charge transfer (ICT)-based emission (ca. 460 nm) in which the o-carborane units acted as the acceptor (A), at 298 K in THF, the LE-based emission dominated. In contrast, the nido-compounds exhibited an intensive emission originating from ICT transitions in which the o-carborane units reversibly acted as the donor (D). In particular, the positive solvatochromic effects of both nido-compounds and the results of theoretical calculations for the o-carboranyl compounds supported the electronic role of the o-carboranyl unit in each compound. Investigation of the radiative decay mechanism of the closo- and nido-compounds using their quantum efficiency (Φem) and decay lifetime (τobs) suggested that the ICT-based radiative decay of nido-compounds occurred more efficiently than the LE-based decay of closo-compounds. These results implied that emission from the closo-compounds was drastically enhanced by the deboronation reaction upon exposure to an increasing concentration of fluoride anions, and finally became similar to the emission color (sky-blue) of the nido-compounds.
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Affiliation(s)
- Mingi Kim
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea.
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12
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Marsh AV, Little M, Cheetham NJ, Dyson MJ, Bidwell M, White AJP, Warriner CN, Swain AC, McCulloch I, Stavrinou PN, Heeney M. Highly Deformed o-Carborane Functionalised Non-linear Polycyclic Aromatics with Exceptionally Long C-C Bonds. Chemistry 2021; 27:1970-1975. [PMID: 33044792 PMCID: PMC7898797 DOI: 10.1002/chem.202004517] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Indexed: 11/16/2022]
Abstract
The effect of substituting o-carborane into the most sterically hindered positions of phenanthrene and benzo(k)tetraphene is reported. Synthesised via a Bull-Hutchings-Quayle benzannulation, the crystal structures of these non-linear acenes exhibited the highest aromatic deformation parameters observed for any reported carborane compound to date, and among the largest carboranyl C-C bond length of all organo-substituted o-carboranes. Photoluminescence studies of these compounds demonstrated efficient intramolecular charge-transfer, leading to aggregation induced emission properties. Additionally, an unusual low-energy excimer was observed for the phenanthryl compound. These are two new members of the family of carborane-functionalised non-linear acenes, notable for their peculiar structures and multi-luminescent properties.
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Affiliation(s)
- Adam V. Marsh
- Department of Chemistry and Centre for Processable ElectronicsImperial College LondonLondonSW7 2AZUK
| | - Mark Little
- Department of Chemistry and Centre for Processable ElectronicsImperial College LondonLondonSW7 2AZUK
| | - Nathan J. Cheetham
- Department of Physics and Centre for Processable ElectronicsImperial College LondonLondonSW7 2AZUK
| | - Matthew J. Dyson
- Molecular Materials and Nanosystems and Institute for Complex Molecular SystemsEindhoven University of Technology5600 MBEindhovenNetherlands
| | - Matthew Bidwell
- Department of Chemistry and Centre for Processable ElectronicsImperial College LondonLondonSW7 2AZUK
| | - Andrew J. P. White
- Department of Chemistry and Centre for Processable ElectronicsImperial College LondonLondonSW7 2AZUK
| | | | | | - Iain McCulloch
- Department of ChemistryChemistry Research LaboratoryUniversity of OxfordOxfordOX1 3TAUK
| | - Paul N. Stavrinou
- Department of Engineering ScienceUniversity of OxfordOxfordOX1 3PJUK
| | - Martin Heeney
- Department of Chemistry and Centre for Processable ElectronicsImperial College LondonLondonSW7 2AZUK
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13
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Sujith S, Lee MH. Synthesis and Delayed Fluorescent Properties of
p‐Nido
‐Carborane‐Triarylborane
Conjugates with a
Methyl‐Substituted
Phenylene Linker. B KOREAN CHEM SOC 2020. [DOI: 10.1002/bkcs.12149] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Surendran Sujith
- Department of Chemistry University of Ulsan Ulsan 44610 Republic of Korea
| | - Min Hyung Lee
- Department of Chemistry University of Ulsan Ulsan 44610 Republic of Korea
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14
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Deboronation-Induced Ratiometric Emission Variations of Terphenyl-Based Closo- o-Carboranyl Compounds: Applications to Fluoride-Sensing. Molecules 2020; 25:molecules25102413. [PMID: 32455846 PMCID: PMC7287808 DOI: 10.3390/molecules25102413] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 05/20/2020] [Accepted: 05/21/2020] [Indexed: 01/02/2023] Open
Abstract
Closo-o-carboranyl compounds bearing the ortho-type perfectly distorted or planar terphenyl rings (closo-DT and closo-PT, respectively) and their nido-derivatives (nido-DT and nido-PT, respectively) were synthesized and fully characterized using multinuclear NMR spectroscopy and elemental analysis. Although the emission spectra of both closo-compounds exhibited intriguing emission patterns in solution at 298 and 77 K, in the film state, closo-DT mainly exhibited a π-π* local excitation (LE)-based emission in the high-energy region, whereas closo-PT produced an intense emission in the low-energy region corresponding to an intramolecular charge transfer (ICT) transition. In particular, the positive solvatochromic effect of closo-PT and theoretical calculation results at the first excited (S1) optimized structure of both closo-compounds strongly suggest that these dual-emissive bands at the high- and low-energy can be assigned to each π-π* LE and ICT transition. Interestingly, both the nido-compounds, nido-DT and nido-PT, exhibited the only LE-based emission in solution at 298 K due to the anionic character of the nido-o-carborane cages, which cannot cause the ICT transitions. The specific emissive features of nido-compounds indicate that the emissive color of closo-PT in solution at 298 K is completely different from that of nido-PT. As a result, the deboronation of closo-PT upon exposure to increasing concentrations of fluoride anion exhibits a dramatic ratiometric color change from orange to deep blue via turn-off of the ICT-based emission. Consequently, the color change response of the luminescence by the alternation of the intrinsic electronic transitions via deboronation as well as the structural feature of terphenyl rings indicates the potential of the developed closo-o-carboranyl compounds that exhibit the intense ICT-based emission, as naked-eye-detectable chemodosimeters for fluoride ion sensing.
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15
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Recent Progress in the Development of Solid‐State Luminescent
o
‐Carboranes with Stimuli Responsivity. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916666] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Ochi J, Tanaka K, Chujo Y. Recent Progress in the Development of Solid-State Luminescent o-Carboranes with Stimuli Responsivity. Angew Chem Int Ed Engl 2020; 59:9841-9855. [PMID: 32009291 DOI: 10.1002/anie.201916666] [Citation(s) in RCA: 122] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Indexed: 12/20/2022]
Abstract
o-Carborane, a cluster compound containing boron and adjacent carbon atoms, displays intriguing luminescent properties. Recently, compounds containing o-carborane units were found to show suppressed aggregation-induced quenching and intense solid-state emission; they also show potential for the development of stimuli-responsive luminochromic materials. In this Minireview, we introduce three kinds of fundamental photochemical properties: aggregation-induced emission, twisted intramolecular charge transfer in crystals, and environment-sensitive excimer formation in solids. Based on these properties, several types of luminochromism, such as thermos-, vapo-, and mechanochromism, have been discovered. Based mainly on results from recent studies, we illustrate these mechanisms as well as unique luminescent behaviors of o-carborane derivatives.
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Affiliation(s)
- Junki Ochi
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan
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17
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Koch R, Sun Y, Orthaber A, Pierik AJ, Pammer F. Turn-on fluorescence sensors based on dynamic intramolecular N→B-coordination. Org Chem Front 2020. [DOI: 10.1039/d0qo00267d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A series of ten aryl-triazole-functionalized boranes bearing BMes2-groups and capable of forming intramolecular five-membered N→B-coordinated heterocycles, has been prepared by 1,3-dipolar cycloaddition.
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Affiliation(s)
- Raphael Koch
- Institute of Organic Chemistry II and Advanced Materials
- University of Ulm
- 89081 Ulm
- Germany
| | - Yu Sun
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- D-67663 Kaiserslautern
- Germany
| | - Andreas Orthaber
- Department of Chemistry – Ångström laboratories
- Uppsala University
- 75120 Uppsala
- Sweden
| | - Antonio J. Pierik
- Fachbereich Chemie
- Technische Universität Kaiserslautern
- D-67663 Kaiserslautern
- Germany
| | - Frank Pammer
- Institute of Organic Chemistry II and Advanced Materials
- University of Ulm
- 89081 Ulm
- Germany
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18
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Kim M, Ryu CH, Hong JH, Lee JH, Hwang H, Lee KM. Planarity of N-aryl in appended 1,2,4-triazole-based o-carboranyl luminophores: a key factor to control intramolecular charge transfer. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00915f] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The distinct difference in the photophysical characteristics between two triazole-based o-carboranes revealed that the planarity of aryl groups strongly influences intramolecular-charge-transfer-based emission.
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Affiliation(s)
- Mingi Kim
- Department of Chemistry
- Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon
- Republic of Korea
| | - Chan Hee Ryu
- Department of Chemistry
- Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon
- Republic of Korea
| | - Ju Hyun Hong
- Department of Chemistry
- Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon
- Republic of Korea
| | - Ji Hye Lee
- Department of Chemistry
- Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon
- Republic of Korea
| | - Hyonseok Hwang
- Department of Chemistry
- Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon
- Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry
- Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon
- Republic of Korea
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19
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Sujith S, Nam EB, Lee J, Lee SU, Lee MH. Enhancing the thermally activated delayed fluorescence of nido-carborane-appended triarylboranes by steric modification of the phenylene linker. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00535e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The introduction of a methyl group into the 4-position of the phenylene linker of nido-carborane–triarylborane D–A dyads, i.e., at the ortho position to the nido-carborane cage, largely enhances their thermally activated delayed fluorescence.
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Affiliation(s)
- Surendran Sujith
- Department of Chemistry
- University of Ulsan
- Ulsan 44610
- Republic of Korea
| | - Eun Bi Nam
- Department of Bionano Technology and Department of Applied Chemistry
- Hanyang University
- Ansan 15588
- Republic of Korea
| | - Junseong Lee
- Department of Chemistry
- Chonnam National University
- Gwangju 61186
- Republic of Korea
| | - Sang Uck Lee
- Department of Bionano Technology and Department of Applied Chemistry
- Hanyang University
- Ansan 15588
- Republic of Korea
| | - Min Hyung Lee
- Department of Chemistry
- University of Ulsan
- Ulsan 44610
- Republic of Korea
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20
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Kim S, Lee JH, So H, Ryu J, Lee J, Hwang H, Kim Y, Park MH, Lee KM. Spirobifluorene-Based o-Carboranyl Compounds: Insights into the Rotational Effect of Carborane Cages on Photoluminescence. Chemistry 2019; 26:548-557. [PMID: 31657858 DOI: 10.1002/chem.201904491] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/25/2019] [Indexed: 12/13/2022]
Abstract
9,9'-Spirobifluorene-based closo-o-carboranyl (SFC1 and SFC2) compounds and their nido-derivatives (nido-SFC1 and nido-SFC2) were prepared and characterized. The two closo-compounds displayed major absorption bands assignable to π-π* transitions involving the spirobifluorene group, as well as weak intramolecular charge-transfer (ICT) transitions between the o-carboranes and their spirobifluorene moieties. The nido-compounds exhibited slightly blueshifted absorption bands resulting from the absence of the ICT transitions corresponding to the o-carborane moieties due to the anionic character of the nido-o-carboranes. While SFC1 exhibited only high-energy emissions in THF at 298 K (only from locally excited (LE) states assignable to π-π* transitions on the spirobifluorene group), remarkable emissions in the low-energy region were observed in the rigid state such as in THF at 77 K and in the film state. SFC2 displayed intense emissions in the low-energy region in all states. The fact that neither of the nido-derivatives of SFC1 and SFC2 exhibited low-energy emissions and the TD-DFT calculation results of each closo-compound clearly verified that the low-energy emission was based on ICT-based radiative decay. The conformational barriers from each relative energy calculation upon changing the dihedral angles around the o-carborane cages for both compounds confirmed that the rotation of the o-carborane cages and terminal phenyl rings for SFC1 is freer than that for SFC2.
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Affiliation(s)
- Seonah Kim
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Ji Hye Lee
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Hyunhee So
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Jiyeon Ryu
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Junseong Lee
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Hyonseok Hwang
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
| | - Youngjo Kim
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Myung Hwan Park
- Department of Chemistry Education, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon, 24341, Republic of Korea
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21
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Photophysical Properties of Spirobifluorene-Based o-Carboranyl Compounds Altered by Structurally Rotating the Carborane Cages. Molecules 2019; 24:molecules24224135. [PMID: 31731632 PMCID: PMC6891568 DOI: 10.3390/molecules24224135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 11/11/2019] [Accepted: 11/13/2019] [Indexed: 11/25/2022] Open
Abstract
9,9′-Spirobifluorene-based o-carboranyl compounds C1 and C2 were prepared and fully characterized by multinuclear nuclear magnetic resonance (NMR) spectroscopy and elemental analysis. The solid-state structure of C1 was also determined by single-crystal X-ray diffractometry. The two carboranyl compounds display major absorption bands that are assigned to π−π* transitions involving their spirobifluorene groups, as well as weak intramolecular charge-transfer (ICT) transitions between the o-carboranes and their spirobifluorene groups. While C1 only exhibited high-energy emissions (λem = ca. 350 nm) in THF at 298 K due to locally excited (LE) states assignable to π−π* transitions involving the spirobifluorene group alone, a remarkable emission in the low-energy region was observed in the rigid state, such as in THF at 77 K or the film state. Furthermore, C2 displays intense dual emissive patterns in both high- and low-energy regions in all states. Electronic transitions that were calculated by time-dependent-DFT (TD-DFT) for each compound based on ground (S0) and first-excited (S1) state optimized structures clearly verify that the low-energy emissions are due to ICT-based radiative decays. Calculated energy barriers that are based on the relative energies associated with changes in the dihedral angle around the o-carborane cages in C1 and C2 clearly reveal that the o-carborane cage in C1 rotates more freely than that in C2. All of the molecular features indicate that ICT-based radiative decay is only available to the rigid state in the absence of structural fluctuations, in particular the free-rotation of the o-carborane cage.
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22
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Martin KL, Smith JN, Young ER, Carter KR. Synthetic Emission Tuning of Carborane-Containing Poly(dihexylfluorene)s. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01325] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Kara L. Martin
- Department of Polymer Science and Engineering, University of Massachusetts—Amherst, 120 Governors Drive, Amherst, Massachusetts 01003, United States
| | - Jessica N. Smith
- Department of Polymer Science and Engineering, University of Massachusetts—Amherst, 120 Governors Drive, Amherst, Massachusetts 01003, United States
| | - Elizabeth R. Young
- Department of Chemistry, Lehigh University, 6 East Packer Avenue, Bethlehem, Pennsylvania 18015, United States
| | - Kenneth R. Carter
- Department of Polymer Science and Engineering, University of Massachusetts—Amherst, 120 Governors Drive, Amherst, Massachusetts 01003, United States
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23
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Nishino K, Tanaka K, Chujo Y. Tuning of Sensitivity in Thermochromic Luminescence by Regulating Molecular Rotation Based on Triphenylamine‐Substituted
o
‐Carboranes. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900537] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kenta Nishino
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura, Nishikyo-ku, Kyoto 615-8510 Japan
| | - Kazuo Tanaka
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura, Nishikyo-ku, Kyoto 615-8510 Japan
| | - Yoshiki Chujo
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura, Nishikyo-ku, Kyoto 615-8510 Japan
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24
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Feng A, Jia Y, Huang L, Wang L, Zhou G, Wang S, Liu P. 1,6-Elimination reaction induced detection of fluoride ions in vitro and in vivo based on a NIR fluorescent probe. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 220:117108. [PMID: 31146206 DOI: 10.1016/j.saa.2019.05.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 04/23/2019] [Accepted: 05/09/2019] [Indexed: 06/09/2023]
Abstract
Near-Infrared "turn on" type fluorescent probes are attractive and promising in the fields of chemical sensing and bioimaging. Here, a new dicyanomethylene-4H-pyran derivative (DCM-Si) NIR fluorescent probe was designed and synthesized for specific lighting up F- in living cells and bodies. SiO bond was used as F- trigger, and the release of fluorophore (DCM-NH2) occurred after substituent reaction and subsequent 1,6-elimination. This NIR probe displayed high sensitivity and selectivity for the sensing of F-, and the detection limit was calculated to be as low as 157 nM. Moreover, the "off-on" fluorescent signal changes can be realized by adding F- in living cells and zebrafish embryos.
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Affiliation(s)
- Aiqing Feng
- Department of Life Science, Luoyang Normal University, Luoyang 471934, PR China
| | - Yongmei Jia
- School of Chemistry and Chemical Engineering, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang, 524048, Guangdong, China
| | - Liping Huang
- School of Chemistry and Chemical Engineering, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang, 524048, Guangdong, China
| | - Lin Wang
- Analytical and Testing Center, Jinan University, Guangzhou 510632, PR China
| | - Guohua Zhou
- School of Chemistry and Chemical Engineering, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang, 524048, Guangdong, China
| | - Sheng Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang, 524048, Guangdong, China
| | - Peilian Liu
- School of Chemistry and Chemical Engineering, Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes, Lingnan Normal University, Zhanjiang, 524048, Guangdong, China.
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25
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Highly efficient aggregation-induced emission and stimuli-responsive fluorochromism triggered by carborane-induced charge transfer state. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.05.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Nishino K, Yamamoto H, Ochi J, Tanaka K, Chujo Y. Time‐Dependent Emission Enhancement of the Ethynylpyrene‐
o
‐Carborane Dyad and Its Application as a Luminescent Color Sensor for Evaluating Water Contents in Organic Solvents. Chem Asian J 2019; 14:1577-1581. [DOI: 10.1002/asia.201900396] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Kenta Nishino
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Hideki Yamamoto
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Junki Ochi
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Kazuo Tanaka
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
| | - Yoshiki Chujo
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura, Nishikyo-ku Kyoto 615–8510 Japan
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27
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Ochi J, Tanaka K, Chujo Y. Improvement of Solid-State Excimer Emission of the Aryl-Ethynyl-o
-Carborane Skeleton by Acridine Introduction. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900212] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Junki Ochi
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
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28
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Effect of Planarity of Aromatic Rings Appended to o-Carborane on Photophysical Properties: A Series of o-Carboranyl Compounds Based on 2-Phenylpyridine- and 2-(Benzo[b]thiophen-2-yl)pyridine. Molecules 2019; 24:molecules24010201. [PMID: 30621119 PMCID: PMC6337515 DOI: 10.3390/molecules24010201] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 12/31/2018] [Accepted: 01/03/2019] [Indexed: 11/16/2022] Open
Abstract
Herein, we investigated the effect of ring planarity by fully characterizing four pyridine-based o-carboranyl compounds. o-Carborane was introduced to the C4 position of the pyridine rings of 2-phenylpyridine and 2-(benzo[b]thiophen-2-yl)pyridine (CB1 and CB2, respectively), and the compounds were subsequently borylated to obtain the corresponding C∧N-chelated compounds CB1B and CB2B. Single-crystal X-ray diffraction analysis of the molecular structures of CB2 and CB2B confirmed that o-carborane is appended to the aryl moiety. In photoluminescence experiments, CB2, but not CB1, showed an intense emission, assignable to intramolecular charge transfer (ICT) transition between the aryl and o-carborane moieties, in both solution and film states. On the other hand, in both solution and film states, CB1B and CB2B demonstrated a strong emission, originating from π-π * transition in the aryl groups, that tailed off to 650 nm owing to the ICT transition. All intramolecular electronic transitions in these o-carboranyl compounds were verified by theoretical calculations. These results distinctly suggest that the planarity of the aryl groups have a decisive effect on the efficiency of the radiative decay due to the ICT transition.
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29
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Choi S, Lee HE, Ryu CH, Lee J, Lee J, Yoon M, Kim Y, Park MH, Lee KM, Kim M. Synthesis of o-carborane-functionalized metal–organic frameworks through ligand exchanges for aggregation-induced emission in the solid state. Chem Commun (Camb) 2019; 55:11844-11847. [DOI: 10.1039/c9cc06386b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
o-Carborane-functionalized MOFs were successfully prepared through ligand exchanges, and the PL were drastically shifted by AIE in the solid state.
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Affiliation(s)
- Sangdon Choi
- Department of Chemistry and BK21Plus Research Team
- Chungbuk National University
- Cheongju
- Korea
| | - Ha-Eun Lee
- Department of Chemistry and BK21Plus Research Team
- Chungbuk National University
- Cheongju
- Korea
| | - Chan Hee Ryu
- Department of Chemistry
- Institute of Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon 24341
- Korea
| | - Jooyeon Lee
- Department of Chemistry and BK21Plus Research Team
- Chungbuk National University
- Cheongju
- Korea
| | - Jihyun Lee
- Department of Nanochemistry, Gachon University
- Sungnam 13120
- Korea
| | - Minyoung Yoon
- Department of Chemistry
- Kyungpook National University
- Daegu 41566
- Korea
| | - Youngjo Kim
- Department of Chemistry and BK21Plus Research Team
- Chungbuk National University
- Cheongju
- Korea
| | - Myung Hwan Park
- Department of Chemistry Education
- Chungbuk National University
- Cheongju
- Korea
| | - Kang Mun Lee
- Department of Chemistry
- Institute of Molecular Science and Fusion Technology
- Kangwon National University
- Chuncheon 24341
- Korea
| | - Min Kim
- Department of Chemistry and BK21Plus Research Team
- Chungbuk National University
- Cheongju
- Korea
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30
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Jin H, Bae HJ, Kim S, Lee JH, Hwang H, Park MH, Lee KM. 2-Phenylpyridine- and 2-(benzo[b]thiophen-2-yl)pyridine-based o-carboranyl compounds: impact of the structural formation of aromatic rings on photophysical properties. Dalton Trans 2019; 48:1467-1476. [DOI: 10.1039/c8dt04367a] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-Phenylpyridine and 2-(benzo[b]thiophen-2-yl)pyridine-based o-carboranyl compounds showed intriguing emission that depended on the structural formation.
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Affiliation(s)
- Hyomin Jin
- Department of Chemistry and Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Gangwon 24341
- Republic of Korea
| | - Hye Jin Bae
- Department of Chemistry
- KAIST
- Daejeon 34142
- Republic of Korea
| | - Seonah Kim
- Department of Chemistry and Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Gangwon 24341
- Republic of Korea
| | - Ji Hye Lee
- Department of Chemistry and Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Gangwon 24341
- Republic of Korea
| | - Hyonseok Hwang
- Department of Chemistry and Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Gangwon 24341
- Republic of Korea
| | - Myung Hwan Park
- Department of Chemistry Education
- Chungbuk National University
- Chungbuk 28644
- Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry and Institute for Molecular Science and Fusion Technology
- Kangwon National University
- Gangwon 24341
- Republic of Korea
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31
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Nishino K, Morisaki Y, Tanaka K, Chujo Y. Design of Thermochromic Luminescent Dyes Based on the Bis(
ortho
‐carborane)‐Substituted Benzobithiophene Structure. Chem Asian J 2018; 14:789-795. [DOI: 10.1002/asia.201801529] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/16/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Kenta Nishino
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura Nishikyo-ku Kyoto 615-8510 Japan
| | - Yasuhiro Morisaki
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura Nishikyo-ku Kyoto 615-8510 Japan
- Present address: Department of Applied Chemistry for EnvironmentSchool of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Kazuo Tanaka
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura Nishikyo-ku Kyoto 615-8510 Japan
| | - Yoshiki Chujo
- Department of Polymer ChemistryGraduate School of EngineeringKyoto University Katsura Nishikyo-ku Kyoto 615-8510 Japan
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32
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Lee JH, Ryu CH, Yu S, Hwang H, Lee KM. Quinolinol-based Al/Triarylborane Dyad Assembly: Alteration of Electronic Transition States Mediated by Fluoride Anion Binding. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11595] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ji Hye Lee
- Department of Chemistry; Institute for Molecular Science and Fusion Technology, Kangwon National University; Chuncheon 24341 Republic of Korea
| | - Chan Hee Ryu
- Department of Chemistry; Institute for Molecular Science and Fusion Technology, Kangwon National University; Chuncheon 24341 Republic of Korea
| | - Seokhyeon Yu
- Department of Chemistry; Institute for Molecular Science and Fusion Technology, Kangwon National University; Chuncheon 24341 Republic of Korea
| | - Hyonseok Hwang
- Department of Chemistry; Institute for Molecular Science and Fusion Technology, Kangwon National University; Chuncheon 24341 Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry; Institute for Molecular Science and Fusion Technology, Kangwon National University; Chuncheon 24341 Republic of Korea
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33
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Pagidi S, Kalluvettukuzhy NK, Thilagar P. Tunable Self-Assembly and Aggregation-Induced Emission Characteristics of Triarylboron-Decorated Naphthalimides. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00166] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sudhakar Pagidi
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Neena K. Kalluvettukuzhy
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Pakkirisamy Thilagar
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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34
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35
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Naito H, Uemura K, Morisaki Y, Tanaka K, Chujo Y. Enhancement of Luminescence Efficiencies by Thermal Rearrangement fromortho- tometa-Carborane in Bis-Carborane-Substituted Acenes. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800151] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hirofumi Naito
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura 615-8510 Nishikyo-ku, Kyoto Japan
| | - Kyoya Uemura
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura 615-8510 Nishikyo-ku, Kyoto Japan
| | - Yasuhiro Morisaki
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura 615-8510 Nishikyo-ku, Kyoto Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura 615-8510 Nishikyo-ku, Kyoto Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura 615-8510 Nishikyo-ku, Kyoto Japan
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36
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Kwak SW, Kwon H, Lee JH, Hwang H, Kim M, Chung Y, Kim Y, Lee KM, Park MH. Salen-indium/triarylborane triads: synthesis and ratiometric emission-colour changes by fluoride ion binding. Dalton Trans 2018; 47:5310-5317. [PMID: 29582029 DOI: 10.1039/c8dt00153g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Salen-based indium triads, [{(3-tBu)2-(5-Mes2B)2-salen}In-Me] (1) and [{(3-tBu)2-(5-Mes2Bphenyl)2-salen}In-Me] (2), bearing triarylborane (TAB) units were prepared and fully characterised by NMR spectroscopy and elemental analysis. The major absorption bands of 1 and 2 appeared in the region centred at 347 nm and 374 nm, respectively, and the intense emission spectra were observed in the sky blue (λem = 491 nm for 1) and bluish-green (λem = 498 nm for 2) regions, respectively. The solvatochromism effects in various organic solvents and computational calculation results strongly suggested that these absorption and emission features are mainly attributed to intramolecular charge transfer (ICT) transitions between the salen ligand moieties and the TAB units. Furthermore, UV-vis and photoluminescence (PL) titration experiments by the addition of fluoride anions demonstrated ratiometric quenching patterns in both the absorption and emission spectra, indicating that binding of the fluoride anion to the boron centres interrupts these ICT transitions in each compound. Interestingly, both triads exhibited a gradual red-shifted response in each emission spectrum upon the addition of the fluoride anions, resulting in a dramatic colour-change to yellow. The computational calculation results of the S1 states revealed that these emission-colour change properties arise from the elevation of HOMO levels, which are mainly localised on the TAB moieties, resulting from the fluoride anion binding to the borane centres.
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Affiliation(s)
- Sang Woo Kwak
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea.
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37
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Nishino K, Uemura K, Tanaka K, Morisaki Y, Chujo Y. Modulation of the cis
- and trans
-Conformations in Bis-o
-carborane Substituted Benzodithiophenes and Emission Enhancement Effect on Luminescent Efficiency by Solidification. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701641] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Kenta Nishino
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku 8510 Kyoto 615- Japan
| | - Kyoya Uemura
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku 8510 Kyoto 615- Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku 8510 Kyoto 615- Japan
| | - Yasuhiro Morisaki
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku 8510 Kyoto 615- Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku 8510 Kyoto 615- Japan
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38
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Wang Z, Wang T, Zhang C, Humphrey MG. N‐Donor/Fluorenyl
o
‐Carborane Fluorophores with Strong Crystallization‐Induced Emission. CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201700199] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Zhaojin Wang
- School of Chemical and Material Engineering Jiangnan University Wuxi 214122 Jiangsu Province P.R. China
| | - Tianyu Wang
- School of Chemical and Material Engineering Jiangnan University Wuxi 214122 Jiangsu Province P.R. China
| | - Chi Zhang
- School of Chemical and Material Engineering Jiangnan University Wuxi 214122 Jiangsu Province P.R. China
| | - Mark G. Humphrey
- School of Chemical and Material Engineering Jiangnan University Wuxi 214122 Jiangsu Province P.R. China
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
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39
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Zhang K, Shen Y, Liu J, Spingler B, Duttwyler S. Crystal structure of a carborane endo/exo-dianion and its use in the synthesis of ditopic ligands for supramolecular frameworks. Chem Commun (Camb) 2018; 54:1698-1701. [DOI: 10.1039/c7cc07724f] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The crystal structure of a monocarba-closo-dodecaborate endo/exo-dianion is reported, featuring a delocalized endohedral charge and a sigma-type C–[Li] moiety.
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Affiliation(s)
- Kang Zhang
- Department of Chemistry, Zhejiang University
- Hangzhou
- P. R. China
| | - Yunjun Shen
- Department of Chemistry, Zhejiang University
- Hangzhou
- P. R. China
| | - Jiyong Liu
- Department of Chemistry, Zhejiang University
- Hangzhou
- P. R. China
| | | | - Simon Duttwyler
- Department of Chemistry, Zhejiang University
- Hangzhou
- P. R. China
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40
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Nishino K, Uemura K, Tanaka K, Chujo Y. Dual emission via remote control of molecular rotation of o-carborane in the excited state by the distant substituents in tolane-modified dyads. NEW J CHEM 2018. [DOI: 10.1039/c7nj04283c] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dual-emissive properties are reported based on the tolane-o-carborane dyads with various substituents.
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Affiliation(s)
- Kenta Nishino
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Kyoya Uemura
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
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41
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Shen Y, Zheng K, Dontha R, Pan Y, Liu J, Duttwyler S. Efficient access to amides of the carborane carboxylic acid [1-(COOH)–CB11H11]−. RSC Adv 2018; 8:22447-22451. [PMID: 35539747 PMCID: PMC9081092 DOI: 10.1039/c8ra03067g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 06/11/2018] [Indexed: 11/21/2022] Open
Abstract
The preparation of the carborane acid chloride [1-(COCl)–CB11H11]− from the carboxylic acid [1-(COOH)–CB11H11]− is reported. This acid chloride exhibits remarkable inertness towards moisture and can be stored under ambient conditions for several months. Reaction with amines affords secondary and tertiary carborane amides [1-(CONR1R2)–CB11H11]− in moderate to high yields under mild conditions. Two of the amide products were characterized by X-ray crystallography in addition to spectroscopic analysis. Preliminary studies show that the amides can be reduced to the corresponding amines and that the acid chloride has the potential to serve as a starting material for carborane ester formation. The preparation of the carborane acid chloride [1-(COCl)–CB11H11]− from the carboxylic acid [1-(COOH)–CB11H11]− and subsequent amide formation are reported.![]()
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Affiliation(s)
- Yunjun Shen
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
| | - Kai Zheng
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
| | - Rakesh Dontha
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
| | - Yani Pan
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
| | - Jiyong Liu
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
| | - Simon Duttwyler
- Department of Chemistry
- Zhejiang University
- 310027 Hangzhou
- P.R. China
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42
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Nishino K, Uemura K, Gon M, Tanaka K, Chujo Y. Enhancement of Aggregation-Induced Emission by Introducing Multiple o-Carborane Substitutions into Triphenylamine. Molecules 2017; 22:molecules22112009. [PMID: 29156590 PMCID: PMC6150215 DOI: 10.3390/molecules22112009] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 11/15/2017] [Accepted: 11/17/2017] [Indexed: 12/29/2022] Open
Abstract
The enhancement of aggregation-induced emission (AIE) is presented on the basis of the strategy for improving solid-state luminescence by employing multiple o-carborane substituents. We synthesized the modified triphenylamines with various numbers of o-carborane units and compared their optical properties. From the optical measurements, the emission bands from the twisted intramolecular charge transfer (TICT) state were obtained from the modified triphenylamines. It was notable that emission efficiencies of the multi-substituted triphenylamines including two or three o-carborane units were enhanced 6- to 8-fold compared to those of the mono-substituted triphenylamine. According to mechanistic studies, it was proposed that the single o-carborane substitution can load the AIE property via the TICT mechanism. It was revealed that the additional o-carborane units contribute to improving solid-state emission by suppressing aggregation-caused quenching (ACQ). Subsequently, intense AIEs were obtained. This paper presents a new role of the o-carborane substituent in the enhancement of AIEs.
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Affiliation(s)
- Kenta Nishino
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
| | - Kyoya Uemura
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
| | - Masayuki Gon
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
| | - Kazuo Tanaka
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
| | - Yoshiki Chujo
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
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43
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Nishino K, Yamamoto H, Tanaka K, Chujo Y. Solid-State Thermochromic Luminescence through Twisted Intramolecular Charge Transfer and Excimer Formation of a Carborane−Pyrene Dyad with an Ethynyl Spacer. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700390] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kenta Nishino
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Hideki Yamamoto
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
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44
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Shen Y, Liu J, Sattasatchuchana T, Baldridge KK, Duttwyler S. Transition Metal Complexes of a Monocarba-closo-dodecaborate Ligand via B-H Activation. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700677] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yunjun Shen
- Department of Chemistry; Zhejiang University; Zheda Road 38 310027 Hangzhou P. R. China
| | - Jiyong Liu
- Department of Chemistry; Zhejiang University; Zheda Road 38 310027 Hangzhou P. R. China
| | - Tosaporn Sattasatchuchana
- Health Sciences Platform; Tianjin University; A203/Building 24; 92 Weijin Road 300072 Tianjin Nankai District P. R. China
| | - Kim K. Baldridge
- Health Sciences Platform; Tianjin University; A203/Building 24; 92 Weijin Road 300072 Tianjin Nankai District P. R. China
| | - Simon Duttwyler
- Department of Chemistry; Zhejiang University; Zheda Road 38 310027 Hangzhou P. R. China
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45
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Photochemical Degradation of Curcumin: a Mechanism for Aqueous Based Sensing of Fluoride. J Fluoresc 2017; 27:2169-2176. [DOI: 10.1007/s10895-017-2156-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 07/31/2017] [Indexed: 10/19/2022]
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46
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You DK, Lee JH, Hwang H, Kwon H, Park MH, Lee KM. Deboronation-induced ratiometric emission sensing of fluoride by 1,3,5-tris-(o-carboranyl-methyl)benzene. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.07.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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47
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Naito H, Nishino K, Morisaki Y, Tanaka K, Chujo Y. Luminescence Color Tuning from Blue to Near Infrared of Stable Luminescent Solid Materials Based on Bis-o-Carborane-Substituted Oligoacenes. Chem Asian J 2017. [DOI: 10.1002/asia.201700815] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hirofumi Naito
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University, Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Kenta Nishino
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University, Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Yasuhiro Morisaki
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University, Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
- Present address: Department of Applied Chemistry for Environment; School of Science and Technology; Kwansei Gakuin University; 2-1 Gakuen, Sanda Hyogo 669-1337 Japan
| | - Kazuo Tanaka
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University, Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
| | - Yoshiki Chujo
- Department of Polymer Chemistry; Graduate School of Engineering; Kyoto University, Katsura, Nishikyo-ku; Kyoto 615-8510 Japan
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48
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Shen Y, Pan Y, Liu J, Sattasathuchana T, Baldridge KK, Duttwyler S. Synthesis and full characterization of an iridium B-H activation intermediate of the monocarba-closo-dodecaborate anion. Chem Commun (Camb) 2017; 53:176-179. [PMID: 27910993 DOI: 10.1039/c6cc08121e] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The preparation and full characterization of an iridium complex of the monocarba-closo-dodecaborate anion is reported. It was prepared by B-H bond activation using a tosyl amide directing group. Analysis by spectroscopic methods and X-ray crystallography revealed the presence a direct B-Ir interaction. The carborane acts as a B,N chelating ligand towards the Ir(Cp*)(solvent) fragment, resulting in a monomeric complex that is inert in solution and the solid state. Treatment with N-chlorosuccinimide resulted in selective monochlorination of the B-Ir position. In addition, its structure, spectroscopic features and reactivity were investigated by DFT calculations.
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Affiliation(s)
- Yunjun Shen
- Department of Chemistry, Zhejiang University, Zheda Road 38, 310027 Hangzhou, P. R. China.
| | - Yani Pan
- Department of Chemistry, Zhejiang University, Zheda Road 38, 310027 Hangzhou, P. R. China.
| | - Jiyong Liu
- Department of Chemistry, Zhejiang University, Zheda Road 38, 310027 Hangzhou, P. R. China.
| | - Tosaporn Sattasathuchana
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Kim K Baldridge
- School of Pharmaceutical Science and Technology, Tianjin University, A203/Building 24, 92 Weijin Road, Nankai District, 300072 Tianjin, P. R. China.
| | - Simon Duttwyler
- Department of Chemistry, Zhejiang University, Zheda Road 38, 310027 Hangzhou, P. R. China.
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49
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You DK, Lee JH, Choi BH, Hwang H, Lee MH, Lee KM, Park MH. Effects of Multi-Carborane Substitution on the Photophysical and Electron-Accepting Properties of o
-Carboranylbenzene Compounds. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700192] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Dong Kyun You
- Department of Chemistry; Institute for Molecular Science and Fusion Technology; Kangwon National University; 24341 Chuncheon Gangwon Republic of Korea
| | - Ji Hye Lee
- Department of Chemistry; Institute for Molecular Science and Fusion Technology; Kangwon National University; 24341 Chuncheon Gangwon Republic of Korea
| | - Byung Hoon Choi
- Department of Chemistry; Institute for Molecular Science and Fusion Technology; Kangwon National University; 24341 Chuncheon Gangwon Republic of Korea
| | - Hyonseok Hwang
- Department of Chemistry; Institute for Molecular Science and Fusion Technology; Kangwon National University; 24341 Chuncheon Gangwon Republic of Korea
| | - Min Hyung Lee
- Department of Chemistry and EHSRC; University of Ulsan; 44610 Ulsan Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry; Institute for Molecular Science and Fusion Technology; Kangwon National University; 24341 Chuncheon Gangwon Republic of Korea
| | - Myung Hwan Park
- Department of Chemistry Education; Chungbuk National University; 28644 Cheongju Chungbuk Republic of Korea
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50
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Shin N, Yu S, Lee JH, Hwang H, Lee KM. Biphenyl- and Fluorene-Based o-Carboranyl Compounds: Alteration of Photophysical Properties by Distortion of Biphenyl Rings. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00093] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nara Shin
- Department of Chemistry and Institute for
Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Seokhyeon Yu
- Department of Chemistry and Institute for
Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Ji Hye Lee
- Department of Chemistry and Institute for
Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Hyonseok Hwang
- Department of Chemistry and Institute for
Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry and Institute for
Molecular Science and Fusion Technology, Kangwon National University, Chuncheon, Gangwon 24341, Republic of Korea
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