1
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Salthouse R, Sil A, Gildea LF, Yufit DS, Williams JAG. Platinum(II) Complexes of Nonsymmetrical NCN-Coordinating Ligands: Unimolecular and Excimeric Luminescence Properties and Comparison with Symmetrical Analogues. Inorg Chem 2023; 62:12356-12371. [PMID: 37498694 PMCID: PMC10410614 DOI: 10.1021/acs.inorgchem.3c01439] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Indexed: 07/29/2023]
Abstract
A series of seven new platinum(II) complexes PtLnCl have been prepared, where Ln is an NCN-coordinating ligand comprising a benzene ring 1,3-disubstituted with two different azaheterocycles. In PtL1-5Cl, one heterocycle is a simple pyridine ring, while the other is an isoquinoline, a quinoline, a pyrimidine (L1, L2, L3), or a p-CF3- or p-OMe-substituted pyridine (L4 and L5). PtL6Cl incorporates both a p-CF3 and a p-OMe-substituted pyridine. The synthesis of the requisite proligands HLn is achieved using Pd-catalyzed cross-coupling methodology. The molecular structures of six of the Pt(II) complexes have been determined by X-ray diffraction. All the complexes are brightly luminescent in deoxygenated solution at room temperature. The absorption and emission properties are compared with those of the corresponding symmetrical complexes featuring two identical heterocycles, PtLnsymCl, and of the parent Pt(dpyb)Cl containing two unsubstituted pyridines [dpybH = 1,3-di(2-pyridyl)benzene]. While the absorption spectra of the nonsymmetrical complexes show features of both PtLnsymCl and Pt(dpyb)Cl, the emission generally resembles that of whichever of the corresponding symmetrical complexes has the lower-energy emission. PtL1Cl differs in that─at room temperature but not at 77 K─it displays emission bands that can be attributed to excited states involving both the pyridine and the isoquinoline rings, despite the latter being unequivocally lower in energy. This unusual behavior is attributed to thermally activated repopulation of the former excited state from the latter, facilitated by the very long-lived nature of the isoquinoline-based excited state. At elevated concentrations, all the complexes show an additional red-shifted emission band attributable to excimers. For PtL1Cl, the excimer strikingly dominates the emission spectra at all but the lowest concentrations (<10-5 M). Trends in the energies of the excimers and their propensity to form are compared with those of the symmetrical analogues.
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Affiliation(s)
| | - Amit Sil
- Department of Chemistry, Durham
University, South Road, Durham DH1
3LE, U.K.
| | - Louise F. Gildea
- Department of Chemistry, Durham
University, South Road, Durham DH1
3LE, U.K.
| | - Dmitry S. Yufit
- Department of Chemistry, Durham
University, South Road, Durham DH1
3LE, U.K.
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2
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Li B, Li Y, Chan MHY, Yam VWW. Phosphorescent Cyclometalated Platinum(II) Enantiomers with Circularly Polarized Luminescence Properties and Their Assembly Behaviors. J Am Chem Soc 2021; 143:21676-21684. [PMID: 34907777 DOI: 10.1021/jacs.1c10943] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Platinum(II) complexes as supramolecular luminescent materials have received considerable attention due to their unique planar structures and fascinating photophysical properties. However, the molecular design of platinum(II) complexes with impressive circularly polarized luminescence properties still remains challenging and rarely explored. Herein, we reported a series of cyclometalated platinum(II) complexes with benzaldehyde and its derived imine-containing alkynyl ligands to investigate their phosphorescent, chiroptical, and self-assembly behaviors. An isodesmic growth mechanism is found for their temperature-dependent self-assembly process. The chiral sense of the enantiomers can be transferred from the chiral alkynyl ligands to the cyclometalated platinum(II) dipyridylbenzene N^C^N chromophore and further amplified through supramolecular assembly via intermolecular noncovalent interactions. Notably, distinctive phosphorescent properties and nanostructured morphologies have been found for enantiomers 4R and 4S. Their intriguing self-assembled nanostructures and phosphorescence behaviors are supported by crystal structure determination, 1H NMR, emission, and UV-vis absorption spectroscopy, scanning electron microscopy, and X-ray powder diffraction studies.
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Affiliation(s)
- Baoning Li
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.,State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong 999077, People's Republic of China
| | - Yongguang Li
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, People's Republic of China
| | - Michael Ho-Yeung Chan
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong 999077, People's Republic of China
| | - Vivian Wing-Wah Yam
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, People's Republic of China.,State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong 999077, People's Republic of China
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3
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Ai Y, Li Y, Chan MHY, Xiao G, Zou B, Yam VWW. Realization of Distinct Mechano- and Piezochromic Behaviors via Alkoxy Chain Length-Modulated Phosphorescent Properties and Multidimensional Self-Assembly Structures of Dinuclear Platinum(II) Complexes. J Am Chem Soc 2021; 143:10659-10667. [PMID: 34232026 DOI: 10.1021/jacs.1c04200] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this work, through the introduction of different lengths of alkoxy chains to the dinuclear cyclometalated platinum(II) complexes, the apparent color, solubility, luminescence properties, and self-assembly behaviors have been remarkably modulated. In the solid state, the luminescence properties have been found to arise from emission origins that switch between the 3MMLCT excited state in the red solids and the 3IL excited state in the yellow state, depending on the alkoxy chain lengths. The luminescence of the yellow solids is found to show obvious bathochromic shifts under mechanical grinding and decreased intensity under controllable hydrostatic pressure. However, the emission of the red solids exhibits both a bathochromic shift and reduced intensity due to the isotropic compression-induced shortening of the Pt···Pt and π-π distances. By combining the data obtained from X-ray diffraction (XRD), infrared (IR), and X-ray single crystal structure, a better understanding of the relationship between molecular aggregation and photophysical properties has been realized, suggesting that the length of the alkoxy chains plays an important role in governing the supramolecular assemblies.
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Affiliation(s)
- Yeye Ai
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China.,Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Hong Kong, P. R. China
| | - Yongguang Li
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Michael Ho-Yeung Chan
- Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Hong Kong, P. R. China
| | - Guanjun Xiao
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Bo Zou
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China
| | - Vivian Wing-Wah Yam
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China.,Institute of Molecular Functional Materials, State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The University of Hong Kong, Hong Kong, P. R. China
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4
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Lee S, Lee Y, Kim K, Heo S, Jeong DY, Kim S, Cho J, Kim C, You Y. Twist to Boost: Circumventing Quantum Yield and Dissymmetry Factor Trade-Off in Circularly Polarized Luminescence. Inorg Chem 2021; 60:7738-7752. [PMID: 33760606 DOI: 10.1021/acs.inorgchem.1c00070] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Circularly polarized luminescence (CPL) enables promising applications in asymmetric photonics. However, the performances of CPL molecules do not yet meet the requirements of these applications. The shortcoming originates from the trade-off in CPL between the photoluminescence quantum yield (PLQY) and the photoluminescence dissymmetry factor (gPL). In this study, we developed a molecular strategy to circumvent this trade-off. Our approach takes advantage of the strong propensity of [Pt(N^C^N)Cl], where the N^C^N ligand is 1-(2-oxazoline)-3-(2-pyridyl)phenylate, to form face-to-face stacks. We introduced chiral substituents, including (S)-methyl, (R)- and (S)-isopropyl, and (S)-indanyl groups, into the ligand framework. This asymmetric control induces torsional displacements that give homohelical stacks of the Pt(II) complexes. X-ray single-crystal structure analyses for the (S)-isopropyl Pt(II) complex reveal the formation of a homohelical dimer with a Pt···Pt distance of 3.48 Å, which is less than the sum of the van der Waals radii of Pt. This helical stack elicits the metal-metal-to-ligand charge-transfer (MMLCT) transition that exhibits strong chiroptical activity due to the electric transition moment making an acute angle to the magnetic transition moment. The PLQY and gPL values of the MMLCT phosphorescence emission of the (S)-isopropyl Pt(II) complex are 0.49 and 8.4 × 10-4, which are improved by factors of ca. 6 and 4, respectively, relative to the values of the unimolecular emission (PLQY, 0.078; gPL, 2.4 × 10-4). Our photophysical measurements for the systematically controlled Pt(II) complexes reveal that the CPL amplifications depend on the chiral substituent. Our investigations also indicate that excimers are not responsible for the enhanced chiroptical activity. To demonstrate the effectiveness of our approach, organic electroluminescence devices were fabricated. The MMLCT emission devices were found to exhibit simultaneous enhancements in the external quantum efficiency (EQE, 9.7%) and the electroluminescence dissymmetry factor (gEL, 1.2 × 10-4) over the unimolecular emission devices (EQE, 5.8%; gEL, 0.3 × 10-4). These results demonstrate the usefulness of using the chiroptically active MMLCT emission for achieving an amplified CPL.
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Affiliation(s)
- Sumin Lee
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Yongmoon Lee
- Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyungmin Kim
- Department of Emerging Materials Science, DGIST, Daegu 42988, Republic of Korea
| | - Seunga Heo
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Dong Yeun Jeong
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Sangsub Kim
- Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Jaeheung Cho
- Department of Emerging Materials Science, DGIST, Daegu 42988, Republic of Korea.,Department of Chemistry, UNIST, Ulsan 44919, Republic of Korea
| | - Changsoon Kim
- Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Youngmin You
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
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5
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Zhang Q, Wang S, Zhu Y, Zhang C, Cao H, Ma W, Tian X, Wu J, Zhou H, Tian Y. Functional Platinum(II) Complexes with Four-Photon Absorption Activity, Lysosome Specificity, and Precise Cancer Therapy. Inorg Chem 2021; 60:2362-2371. [PMID: 33494602 DOI: 10.1021/acs.inorgchem.0c03245] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Multiphoton materials are in special demand in the field of photodynamic therapy and multiphoton fluorescence imaging. However, rational design methodology for these brands of materials is still nascent. This is despite transition-metal complexes favoring optimized nonlinear-optical (NLO) activity and heavy-atom-effected phosphorescent emission. Here, three four-photon absorption (4PA) platinum(II) complexes (Pt1-Pt3) are achieved by the incorporation of varied functionalized C^N^C ligands with high yields. Pt1-Pt3 exhibit triplet metal-to-ligand charge-transfer transitions at ∼460 nm, which are verified multiple times by transient absorption spectra, time-dependent density functional theory calculations, and low-temperature emission spectra. Further, Pt1-Pt3 undergo 4PA. Notably, one of the complexes, Pt2, has maximum 4PA cross-sectional values of up to 15.2 × 10-82 cm8 s3 photon-3 under excitation of a 1600 nm femtosecond laser (near-IR II window). The 4PA cross sections vary when Pt2 is binding to lecithin and when it displays its lysosome-specific targeting behavior. On the basis of the excellent 4PA property of Pt2, we believe that those 4PA platinum(II) complexes have great potential applications in cancer theranostics.
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Affiliation(s)
- Qiong Zhang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Shujing Wang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Yingzhong Zhu
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Chengkai Zhang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Hongzhi Cao
- School of Life Science, Anhui University, Hefei 230601, P. R. China
| | - Wen Ma
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Xiaohe Tian
- School of Life Science, Anhui University, Hefei 230601, P. R. China
| | - Jieying Wu
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Hongping Zhou
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Yupeng Tian
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
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6
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Li Y, Fei Y, Sun H, Yu S, Liu J. Regulation of the Switchable Luminescence of Tridentate Platinum(II) Complexes by Photoisomerization. Front Chem 2021; 8:622256. [PMID: 33614596 PMCID: PMC7892467 DOI: 10.3389/fchem.2020.622256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 12/21/2020] [Indexed: 12/22/2022] Open
Abstract
Organoplatinum (II) complexes are promising candidates for the construction of smart supramolecular materials due to their unique flat structures. This accompanied by intriguing luminescent properties, prompts the molecules to aggregate after external stimuli. Nevertheless, the utilization of photo-responsive subunits to modulate their assemble behaviors and functions are still rarely explored. In this work, azobenzene (azo)-appended tridentate platinum (II) complexes with different linkers have been designed and synthesized. The intermolecular hydrogen bonding, π-π stacking, and metal-metal interactions were finely controlled through the tiny alteration of the linkers, which was found to play a vital role in self-assembly, and photophysical and photoisomerization properties. Some of them exhibited dual emission bands originating from metal-perturbed triplet intraligand (3IL) and metal-metal to ligand charge transfer (3MMLCT) excited states due to the different intermolecular interactions. Based on this, the manipulation of switchable luminescence as well as the controllable morphologies have been realized by photoisomerization.
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Affiliation(s)
- Yongguang Li
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, China
| | | | | | | | - Junqiu Liu
- College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, China
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7
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Oliveira CG, Romero-Canelón I, Coverdale JPC, Maia PIS, Clarkson GJ, Deflon VM, Sadler PJ. Novel tetranuclear PdII and PtII anticancer complexes derived from pyrene thiosemicarbazones. Dalton Trans 2020; 49:9595-9604. [DOI: 10.1039/d0dt01133a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Cyclometallated palladium(ii) and platinum(ii) pyrenyl-derived thiosemicarbazone (H2PrR) complexes of the type [M4(μ-S-PrR-κ3-C,N,S)4] (M = PdII, PtII; R = ethyl, cyclohexyl) have been synthesised in good yields and fully characterised.
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Affiliation(s)
- Carolina G. Oliveira
- São Carlos Institute of Chemistry
- University of São Paulo
- São Carlos
- Brazil
- Institute of Chemistry
| | | | | | - Pedro Ivo S. Maia
- Department of Chemistry
- Federal University of the Triângulo Mineiro
- 38025-440 Uberaba
- Brazil
| | | | - Victor M. Deflon
- São Carlos Institute of Chemistry
- University of São Paulo
- São Carlos
- Brazil
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8
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Abstract
The title compound, C24H18N4, crystallizes with three molecules in the asymmetric unit. In the crystal, weak C—H...π interactions link the molecules.
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9
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Rajabi S, Jamali S, Naseri S, Jamjah A, Kia R, Samouei H, Mastrorilli P, Shahsavari HR, Raithby PR. Pt–M (M = Au and Tl) Dative Bonds Using Bis(cyclometalated)platinum(II) Complexes. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00907] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sheida Rajabi
- Chemistry Department, Sharif University of Technology, P.O. Box 11155-3516, Tehran 1458889694, Iran
| | - Sirous Jamali
- Chemistry Department, Sharif University of Technology, P.O. Box 11155-3516, Tehran 1458889694, Iran
| | - Soroosh Naseri
- Chemistry Department, Sharif University of Technology, P.O. Box 11155-3516, Tehran 1458889694, Iran
| | - Ali Jamjah
- Chemistry Department, Sharif University of Technology, P.O. Box 11155-3516, Tehran 1458889694, Iran
| | - Reza Kia
- Chemistry Department, Sharif University of Technology, P.O. Box 11155-3516, Tehran 1458889694, Iran
| | - Hamidreza Samouei
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | | | - Hamid R. Shahsavari
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
| | - Paul R. Raithby
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
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10
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E. Ali T, A. Assiri M, A. Ibrahim M, M. El-Amin E, S. Yahia I. 4,6-Diacetylresorcinol in Heterocyclic Synthesis Part II: Synthesis of Some Novel 4,6-Bis(azolyl/azinyl/azepinyl)resorcinols. HETEROCYCLES 2019. [DOI: 10.3987/com-18-14020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Haque A, Xu L, Al-Balushi RA, Al-Suti MK, Ilmi R, Guo Z, Khan MS, Wong WY, Raithby PR. Cyclometallated tridentate platinum(ii) arylacetylide complexes: old wine in new bottles. Chem Soc Rev 2019; 48:5547-5563. [DOI: 10.1039/c8cs00620b] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Platinum(ii) cyclometallated pincer complexes with an alkynyl ligand in the fourth coordination site display excellent luminescent properties. By manipulation of the pincer and the alkynyl ligand their luminescence can be fine-tuned for opto-electronic applications.
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Affiliation(s)
- Ashanul Haque
- Department of Chemistry
- College of Science
- University of Hail
- Kingdom of Saudi Arabia
| | - Linli Xu
- Department of Applied Biology & Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- P. R. China
| | - Rayya A. Al-Balushi
- Department of Basic Sciences
- College of Applied and Health Sciences
- A’Sharqiyah University
- Ibra 400
- Sultanate of Oman
| | | | - Rashid Ilmi
- Department of Chemistry
- Sultan Qaboos University
- Al-Khod 123
- Sultanate of Oman
| | - Zeling Guo
- Department of Applied Biology & Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- P. R. China
- The Hong Kong Polytechnic University Shenzhen Research Institute
| | - Muhammad S. Khan
- Department of Chemistry
- Sultan Qaboos University
- Al-Khod 123
- Sultanate of Oman
| | - Wai-Yeung Wong
- Department of Applied Biology & Chemical Technology
- The Hong Kong Polytechnic University
- Hung Hom
- P. R. China
- The Hong Kong Polytechnic University Shenzhen Research Institute
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12
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Fang B, Zhu Y, Hu L, Shen Y, Jiang G, Zhang Q, Tian X, Li S, Zhou H, Wu J, Tian Y. Series of C^N^C Cyclometalated Pt(II) Complexes: Synthesis, Crystal Structures, and Nonlinear Optical Properties in the Near-Infrared Region. Inorg Chem 2018; 57:14134-14143. [DOI: 10.1021/acs.inorgchem.8b01967] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Bin Fang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Yingzhong Zhu
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Lei Hu
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Yu Shen
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Guoqing Jiang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Qiong Zhang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Xiaohe Tian
- School of Life Science, Anhui University, Hefei 230039, China
| | - Shengli Li
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Hongping Zhou
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Jieying Wu
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Yupeng Tian
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
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13
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Robinson ME, Nazemi A, Lunn DJ, Hayward DW, Boott CE, Hsiao MS, Harniman RL, Davis SA, Whittell GR, Richardson RM, De Cola L, Manners I. Dimensional Control and Morphological Transformations of Supramolecular Polymeric Nanofibers Based on Cofacially-Stacked Planar Amphiphilic Platinum(II) Complexes. ACS NANO 2017; 11:9162-9175. [PMID: 28836765 DOI: 10.1021/acsnano.7b04069] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Square-planar platinum(II) complexes often stack cofacially to yield supramolecular fiber-like structures with interesting photophysical properties. However, control over fiber dimensions and the resulting colloidal stability is limited. We report the self-assembly of amphiphilic Pt(II) complexes with solubilizing ancillary ligands based on polyethylene glycol [PEGn, where n = 16, 12, 7]. The complex with the longest solubilizing PEG ligand, Pt-PEG16, self-assembled to form polydisperse one-dimensional (1D) nanofibers (diameters <5 nm). Sonication led to short seeds which, on addition of further molecularly dissolved Pt-PEG16 complex, underwent elongation in a "living supramolecular polymerization" process to yield relatively uniform fibers of length up to ca. 400 nm. The fiber lengths were dependent on the Pt-PEG16 complex to seed mass ratio in a manner analogous to a living covalent polymerization of molecular monomers. Moreover, the fiber lengths were unchanged in solution after 1 week and were therefore "static" with respect to interfiber exchange processes on this time scale. In contrast, similarly formed near-uniform fibers of Pt-PEG12 exhibited dynamic behavior that led to broadening of the length distribution within 48 h. After aging for 4 weeks in solution, Pt-PEG12 fibers partially evolved into 2D platelets. Furthermore, self-assembly of Pt-PEG7 yielded only transient fibers which rapidly evolved into 2D platelets. On addition of further fiber-forming Pt complex (Pt-PEG16), the platelets formed assemblies via the growth of fibers selectively from their short edges. Our studies demonstrate that when interfiber dynamic exchange is suppressed, dimensional control and hierarchical structure formation are possible for supramolecular polymers through the use of kinetically controlled seeded growth methods.
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Affiliation(s)
| | | | | | | | | | - Ming-Siao Hsiao
- UES, Inc. and Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base , Wright-Patterson AFB, Ohio 45433, United States
| | | | | | | | | | - Luisa De Cola
- ISIS and icFRC, Université de Strasbourg and CNRS , 8 Allée Gaspard Monge, 67000 Strasbourg, France
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14
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Cao X, Zhao N, Zou G, Gao A, Ding Q, Zeng G, Wu Y. A dual response organogel system based on an iridium complex and a Eu(iii) hybrid for volatile acid and organic amine vapors. SOFT MATTER 2017; 13:3802-3811. [PMID: 28485752 DOI: 10.1039/c7sm00714k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A thiophene-based hybrid organogel system consisting of complex iridium (Ir) and EuCl3·6H2O was designed and synthesized to realize dual responses to volatile acids and organic amine vapors. The photophysical properties and self-assembly of compound 1 and the hybrid organogel were also studied. Compound 1 could gelate some organic solvents and self-assemble into 3D nanofibers in the gels. The stable hybrid organogel 1-Ir-Eu could be obtained after addition of complex Ir and EuCl3·6H2O. FTIR spectral results showed that the hydrogen bond still remained even upon addition of complex Ir, EuCl3·6H2O, NaOH and CF3COOH to organogel 1. Interestingly, the emission properties of the hybrid organogel 1-Ir-Eu could undergo interconversion between cyan light and red light via addition of NaOH and CF3COOH. The emission properties of xerogel film 1-Ir-Eu obtained in the presence of NaOH could also undergo fast and reversible transition in response to volatile acids such as CF3COOH, formic acid, acetic acid, propionic acid and organic amine vapors such as ammonium hydroxide, Et3N, tripropylamine, and ethylenediamine. The emission spectral change of Ir-Eu in the organogel or xerogel in the presence of base and acid demonstrated the formation of a new complex between complex Ir and EuCl3·6H2O. This dual-response process could be repeated many times. Contact angle experiment results further showed the morphology and internal components of the xerogel film surface in the process of response to gaseous CF3COOH and Et3N. This work provides a method for producing multifunctional supramolecular materials for sensing volatile acids and organic amine vapors.
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Affiliation(s)
- Xinhua Cao
- College of Chemistry and Chemical Engineering & Henan Province Key laboratory of Utilization of Non-metallic Mineral in the South of Henan, Institute for Conservation and Utilization of Agro-bioresources in Dabie Mountains, Xinyang Normal University, Xinyang 464000, China.
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15
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Hebenbrock M, Stegemann L, Kösters J, Doltsinis NL, Müller J, Strassert CA. Phosphorescent Pt(ii) complexes bearing a monoanionic C^N^N luminophore and tunable ancillary ligands. Dalton Trans 2017; 46:3160-3169. [DOI: 10.1039/c7dt00393e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A new monoanionic pincer luminophore is presented, yielding phosphorescent Pt(ii) complexes bearing a neutral 1,2,3-triazole ring introduced via click chemistry. The overall charge, intermolecular interactions and excited state properties can be manipulated and controlled.
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Affiliation(s)
- Marian Hebenbrock
- Institut für Anorganische und Analytische Chemie
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Linda Stegemann
- Physikalisches Institut and Center for Nanotechnology
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Jutta Kösters
- Institut für Anorganische und Analytische Chemie
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Nikos L. Doltsinis
- Institut für Festkörpertheorie and Center for Multiscale Theory and Computation
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Jens Müller
- Institut für Anorganische und Analytische Chemie
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
| | - Cristian A. Strassert
- Physikalisches Institut and Center for Nanotechnology
- Westfälische Wilhelms-Universität Münster
- D-48149 Münster
- Germany
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16
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Bi D, Feng Y, Zhao Q, Wang H, Zhu Y, Bao X, Fan H, Yu L, Yang Q, Qiu D. Synthesis, crystal structure, photophysical property and metal ion-binding behavior of a cyclometalated platinum(ii) terpyridylacetylide with efficient π-conjugation degree. RSC Adv 2017. [DOI: 10.1039/c7ra09423j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The “Donor–Phosphore–Receptor” platform as a novel building block for formation of heterotrinuclear transition metal complexes.
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Affiliation(s)
- Dongqin Bi
- College of Chemistry and Pharmacy Engineering
- Nanyang Normal University
- Nanyang
- P. R. China
| | - Yuquan Feng
- College of Chemistry and Pharmacy Engineering
- Nanyang Normal University
- Nanyang
- P. R. China
| | - Qian Zhao
- College of Chemistry and Pharmacy Engineering
- Nanyang Normal University
- Nanyang
- P. R. China
| | - Hongwei Wang
- College of Chemistry and Pharmacy Engineering
- Nanyang Normal University
- Nanyang
- P. R. China
| | - Yongsheng Zhu
- College of Chemistry and Pharmacy Engineering
- Nanyang Normal University
- Nanyang
- P. R. China
| | - Xiaoyu Bao
- College of Chemistry and Pharmacy Engineering
- Nanyang Normal University
- Nanyang
- P. R. China
| | - Huitao Fan
- College of Chemistry and Pharmacy Engineering
- Nanyang Normal University
- Nanyang
- P. R. China
| | - Lintao Yu
- College of Chemistry and Pharmacy Engineering
- Nanyang Normal University
- Nanyang
- P. R. China
| | - Qichao Yang
- College of Chemistry and Pharmacy Engineering
- Nanyang Normal University
- Nanyang
- P. R. China
| | - Dongfang Qiu
- College of Chemistry and Pharmacy Engineering
- Nanyang Normal University
- Nanyang
- P. R. China
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