1
|
Su MM, Kang JJ, Liu SQ, Meng CG, Li YQ, Zhang JJ, Ni J. Strategy for Achieving Long-Wavelength Near-Infrared Luminescence of Diimineplatinum(II) Complexes. Inorg Chem 2021; 60:3773-3780. [PMID: 33615779 DOI: 10.1021/acs.inorgchem.0c03529] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Although many strategies have been used to help design effective near-infrared (NIR) luminescent materials, it is still a huge challenge to realize long-wavelength NIR luminescence of diimineplatinum(II) complexes in the solid state. Herein, we have successfully achieved long-wavelength NIR luminescence of a family of diimineplatinum(II) complexes based on a new strategy that combines a one-dimensional (1D) "Pt wire" structure with the electronic effect of the substituent. The structures of six solvated diimineplatinum(II) complexes based on 4,4-dichloro-2,2'-bipyridine or 4,4-dibromo-2,2'-bipyridine and 4-substituted phenylacetylene ligands have been determined, namely, 1·1/2toluene, 2·1/2THF, 3·1/8toluene, 4·1/2THF, 5·1/8CH2Cl2, and 6·1/4toluene. All of them crystallize in the monoclinic space group C2/c or C2/m and stack in the 1D "Pt wire" structure. In the solid state, six complexes exhibited unusual long-wavelength metal-metal-to-ligand charge-transfer luminescence that peaked at 984, 1044, 972, 990, 1022, and 935 nm, respectively. Interestingly, 2·1/2THF has the shortest Pt···Pt distance and the longest emission wavelength among the six complexes. As far as we know, the luminescence of 2·1/2THF at 1044 nm is the longest emission wavelength among known diimineplatinum(II) complexes. Systematic studies revealed that good molecular planarity, suitable substituent position, weak hydrogen-bond-forming ability of the substituents, appropriate molecular bending, and weakening of the interaction between solvated molecules and platinum molecules are conducive to the construction of a 1D "Pt wire" structure of the diimineplatinum(II) complex. Furthermore, the emission energy of the complex is mainly determined by the strength of the Pt-Pt interaction and electronic effect of the substituent.
Collapse
Affiliation(s)
- Meng-Meng Su
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Jia-Jia Kang
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Shu-Qin Liu
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Chang-Gong Meng
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Yan-Qin Li
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Jian-Jun Zhang
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Jun Ni
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| |
Collapse
|
2
|
Fuertes S, Chueca AJ, Martín A, Sicilia V. New NHC cycloplatinated compounds. Significance of the cyclometalated group on the electronic and emitting properties of bis-cyanide compounds. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.03.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
3
|
Chi Y, Tsai HY, Chen YK. Pt(II) Complexes with Azolate-containing Bidentate Chelate: Design, Photophysics, and Application. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201700090] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yun Chi
- Department of Chemistry; National Tsing Hua University; Hsinchu 30013 Taiwan
| | - Han-Yan Tsai
- Department of Chemistry; National Tsing Hua University; Hsinchu 30013 Taiwan
| | - Yi-Kuang Chen
- Department of Chemistry; National Tsing Hua University; Hsinchu 30013 Taiwan
| |
Collapse
|
4
|
Klaus DR, Keene M, Silchenko S, Berezin M, Gerasimchuk N. 1D polymeric platinum cyanoximate: a strategy toward luminescence in the near-infrared region beyond 1000 nm. Inorg Chem 2015; 54:1890-900. [PMID: 25615022 PMCID: PMC7441041 DOI: 10.1021/ic502805h] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We report the synthesis and properties of the first representative of a new class of PtL2 complexes with ambidentate mixed-donor cyanoxime ligands [L = 2-cyano-2-oximino-N,N'-diethylaminoacetamide, DECO (1)]. Three differently colored polymorphs of "Pt(DECO)2" (3-5) were isolated, with the first two being crystallographically characterized. The dark-green complex [Pt(DECO)2]n (5) spontaneously forms in aqueous solution via aggregation of yellow monomeric complex 3 into the red dimer [Pt(DECO)2]2 (4), followed by further oligomerization into coordination polymer 5. A spectroscopic and light-scattering study revealed a "poker-chips"-type 1D polymeric structure of 5 in which units are held by noncovalent metallophilic interactions, forming a Pt---Pt wire. The polymer 5 shows a broad absorption at 400-900 nm and emission at unusually long wavelengths in the range of 1000-1100 nm in the solid state. The near-infrared (NIR) emission of polymer 5 is due to the formation of a small amount of nonstoichiometric mixed-valence Pt(II)/Pt(IV) species during synthesis. A featureless electron paramagnetic resonance spectrum of solid sample 5 recorded at +23 and -193 °C evidences the absence of Pt(III) states, and the compound represents a "solid solution" containing mixed-valence Pt(II)/Pt(IV) centers. Exposure of KBr pellets with 5% 5 to Br2 vapors leads to an immediate ∼30% increase in the intensity of photoluminescence at 1024 nm, which confirms the role and importance of mixed-valence species for the NIR emission. Thus, the emission is further enhanced upon additional oxidation of Pt(II) centers, which improves delocalization of electrons along the Pt---Pt vector. Other polymorph of the "Pt(DECO)2" complex--monomer--did not demonstrate luminescent properties in solutions and the solid state. An excitation scan of 5 embedded in KBr tablets revealed an emission only weakly dependent on the wavelength of excitation. The NIR emission of quasi-1D complex 5 was studied in the range of -193 to +67 °C. Data showed a blue shift of λmax and a simultaneous increase in the emission line intensity with a temperature rise, which is explained by analogy with similar behavior of known quasi-1D K2[Pt(CN)4]-based solids, quantum dots, and quantum wells with delocalized carriers. The presented finding opens a route to a new class of platinum cyanoxime based NIR emissive complexes that could be used in the design of novel NIR emitters and imaging agents.
Collapse
Affiliation(s)
- Danielle R. Klaus
- Department of Chemistry, Missouri State University (MSU), Temple Hall 456, Springfield, Missouri 56897, United States
| | - Matthew Keene
- Department of Chemistry, Missouri State University (MSU), Temple Hall 456, Springfield, Missouri 56897, United States
| | - Svitlana Silchenko
- Absorption Systems, Inc.; 440 Creamery Way, S. 300, Exton, Pennsylvania 19341, United States
| | - Mikhail Berezin
- Department of Radiology, Washington University of St. Louis Medical School, St. Louis, Missouri 63110, United States
| | - Nikolay Gerasimchuk
- Department of Chemistry, Missouri State University (MSU), Temple Hall 456, Springfield, Missouri 56897, United States
| |
Collapse
|
5
|
Wang Q, Oswald IWH, Yang X, Zhou G, Jia H, Qiao Q, Chen Y, Hoshikawa-Halbert J, Gnade BE. A non-doped phosphorescent organic light-emitting device with above 31% external quantum efficiency. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:8107-8113. [PMID: 25219957 DOI: 10.1002/adma.201402947] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 07/31/2014] [Indexed: 06/03/2023]
Abstract
The demonstrated square-planar Pt(II)-complex has reduced triplet-triplet quenching and therefore a near unity quantum yield in the neat thin film. A non-doped phosphorescent organic light-emitting diode (PhOLED) based on this emitter achieves (31.1 ± 0.1)% external quantum efficiency without any out-coupling, which shows that a non-doped PhOLED can be comparable in efficiency to the best doped devices with very complicated device structures.
Collapse
Affiliation(s)
- Qi Wang
- Department of Materials Science and Engineering and Erik Jonsson School of Engineering and Computer Science, University of Texas at Dallas, Richardson, TX, 75083, USA; Department of Electrical Engineering and Computer Sciences, College of Engineering, South Dakota State University, Brookings, SD, 57007, USA; Department of Applied Chemistry, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Zhou K, Qin C, Wang XL, Shao KZ, Yan LK, Su ZM. Self-assembly of an all-thiol-stabilized {Ag28S23} high-nuclearity luminescent nanocluster with a “crab-like” shape. Dalton Trans 2014; 43:10695-9. [DOI: 10.1039/c4dt00762j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
7
|
Zhou K, Wang XL, Qin C, Wang HN, Yang GS, Jiao YQ, Huang P, Shao KZ, Su ZM. Serendipitous anion-templated self-assembly of a sandwich-like Ag20S10macrocycle-based high-nuclearity luminescent nanocluster. Dalton Trans 2013. [DOI: 10.1039/c2dt32145a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
8
|
BAI FUQUAN, LIU TAO, ZHOU XIN, ZHANG JIANPO, ZHANG HONGXING. THEORETICAL COMPUTATIONAL STUDIES ON ELECTRONIC STRUCTURES, SPECTROSCOPIC PROPERTIES AND NITROGEN HETEROATOM EFFECT OF A SPECIES OF ASYMMETRICAL DIIMINE LIGAND PLATINUM(II) COMPLEXES. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633609004952] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Electronic structures and spectroscopic properties of a series of platinum(II) complexes based on the C-linked asymmetrical diimine ligand (2-pyridyl-pyrazole (1), 2-pyridyl-1,2,4-triazole (2), 2-pyridyl-tetrazole (3), 2-pyrazine-pyrazole (4) have been studied by the time-dependent density functional theory calculations with polarizable continuum model. The ground- and excited-state structures were optimized by the density functional theory and single-excitation configuration interaction methods, respectively. The calculated structures and spectroscopic properties are in agreement with the corresponding experimental data. The results of the spectroscopic investigations revealed that the lowest-energy absorptions have1,3metal-to-ligand charge transfer (MLCT)/1,3single ligand centered charge transfer (ILCT) mixing characters. The highest-occupied molecular orbitals (HOMOs) of 1–4 are composed of Pt ( d yz) and azole, while the lowest-unoccupied molecular orbitals (LUMOs) are mainly localized upon the pyridyl-azolate ligand (70% on the pyridine segment). From 1 to 3, the molecular orbital (MO) energies of HOMO and LUMO are decreased and the HOMO energies are changed more remarkably. This is caused by that the conjugation of the azolate segment of the ligand are enhanced through introducing more N heteroatoms into this segment. As a result of MO energy change, the lowest-energy absorptions are blue-shifted in the order 1 < 2 < 3. With the replacement of pyridyl by pyrazine, the HOMO energy of 4 is comparable to 1, but the LUMO energy is decreased by 0.8 eV, and the lowest-energy absorptions are red-shifted to 2.36 eV. Otherwise, the phosphorescent emissions of these complexes have the 3MLCT/3ILCT characters, and should originate from the lowest-energy absorptions. The emissions of 1–4 are red-shifted in the order 3 < 2 < 1 < 4. The heteroatom effect is suitable for tuning the spectra of this kind of materials.
Collapse
Affiliation(s)
- FU-QUAN BAI
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
| | - TAO LIU
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
| | - XIN ZHOU
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
| | - JIAN-PO ZHANG
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
| | - HONG-XING ZHANG
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
| |
Collapse
|
9
|
Liu GX, Liu Y, Nishihara S, Ren XM. Synthesis, characterization, and crystal structures of two novel ion-pair complexes based on benzene-1,2-dithiolate ligand. RUSS J COORD CHEM+ 2010. [DOI: 10.1134/s1070328410030103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
10
|
Wang KW, Chen JL, Cheng YM, Chung MW, Hsieh CC, Lee GH, Chou PT, Chen K, Chi Y. Mono- versus Dinuclear Pt(II) 6-(5-Trifluoromethyl-Pyrazol-3-yl)-2,2′-Bipyridine Complexes: Synthesis, Characterization, and Remarkable Difference in Luminescent Properties. Inorg Chem 2010; 49:1372-83. [DOI: 10.1021/ic9011313] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kang-Wei Wang
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Jing-Lin Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan
- School of Material and Chemistry Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, 341000, China
| | - Yi-Ming Cheng
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Min-Wen Chung
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Cheng-Chih Hsieh
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Gene-Hsiang Lee
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Kellen Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Yun Chi
- Department of Chemistry, National Tsing Hua University, Hsinchu 300, Taiwan
| |
Collapse
|
11
|
Kuo CY, Wu MJ, Lin CC. Synthesis and antitumor activity of cis-dichloridoplatinum(II) complexes of 1,1′-biisoquinolines. Eur J Med Chem 2010; 45:55-62. [DOI: 10.1016/j.ejmech.2009.09.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Revised: 07/27/2009] [Accepted: 09/10/2009] [Indexed: 10/20/2022]
|
12
|
Hsieh HY, Lin CH, Tu GM, Chi Y, Lee GH. Platinum(II) complexes with spatially encumbered chelates; syntheses, structure and photophysics. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.06.041] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
13
|
Constable EC, Housecroft CE, Neuburger M, Rösel PJ, Schaffner S. Diversification of ligand families through ferroin–neocuproin metal-binding domain manipulation. Dalton Trans 2009:4918-27. [DOI: 10.1039/b905988a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
14
|
Liu GX, Yan J, Huang LF, Ren XM. Molecular Spin Ladders Constructed from [Ni(dmit)2]− Building Blocks: Synthesis, Structure and Physical Properties. J Inorg Organomet Polym Mater 2008. [DOI: 10.1007/s10904-008-9235-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
15
|
Chang SY, Cheng YM, Chi Y, Lin YC, Jiang CM, Lee GH, Chou PT. Emissive Pt(II) complexes bearing both cyclometalated ligand and 2-pyridyl hexafluoropropoxide ancillary chelate. Dalton Trans 2008:6901-11. [PMID: 19050776 DOI: 10.1039/b808602h] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new series of mono-cyclometalated Pt(II) complexes 1-4 with chelating 2-pyridyl hexafluoropropoxide as the ancillary ligand were synthesized. Single crystal X-ray diffraction studies were examined, giving evidence for the occurrence of pi pi stacking between the cyclometalated ligands, but a lack of intermolecular Pt ... Pt interaction. Among these complexes, the benzo[h]quinoline analogue 2a shows the greatest degree of pi pi stacking, which is also confirmed by the observation of additional, large Stokes shifted emission attributed to the aggregated counterparts in solid thin film. All these Pt(II) complexes are highly emissive in solid state, whereas except for 4-phenylquinazoline analogues 4a and 4b, complexes 1-3 in solution are subject to dominant radiationless deactivation induced, in part, by the solvent collision to the square planar Pt(II) framework. Electroluminescent OLEDs employing 2-phenylpyridine analogue 1b as the dopants were fabricated, rendering satisfactory performance data suited for future improvement.
Collapse
Affiliation(s)
- Sheng-Yuan Chang
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan
| | | | | | | | | | | | | |
Collapse
|
16
|
Ilkun OT, Archibald SJ, Barnes CL, Gerasimchuk N, Biagioni R, Silchenko S, Gerasimchuk OA, Nemykin VN. Benz(2-heteroaryl)cyanoximes and their Tl(i) complexes: new room temperature blue emitters. Dalton Trans 2008:5715-29. [DOI: 10.1039/b803846e] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
17
|
Szeto KC, Kongshaug KO, Jakobsen S, Tilset M, Lillerud KP. Design, synthesis and characterization of a Pt–Gd metal–organic framework containing potentially catalytically active sites. Dalton Trans 2008:2054-60. [PMID: 18382783 DOI: 10.1039/b719766g] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Kai C Szeto
- Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126, Blindern, N-0318, Oslo, Norway
| | | | | | | | | |
Collapse
|
18
|
Chang SY, Chen JL, Chi Y, Cheng YM, Lee GH, Jiang CM, Chou PT. Blue-Emitting Platinum(II) Complexes Bearing both Pyridylpyrazolate Chelate and Bridging Pyrazolate Ligands: Synthesis, Structures, and Photophysical Properties. Inorg Chem 2007; 46:11202-12. [DOI: 10.1021/ic701586c] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
19
|
Ventura B, Barigelletti F, Durola F, Flamigni L, Sauvage JP, Wenger OS. Fe(II), Ru(II) and Re(I) complexes of endotopic, sterically non-hindering, U-shaped 8,8'-disubstituted-3,3'-biisoquinoline ligands: syntheses and spectroscopic properties. Dalton Trans 2007:491-8. [PMID: 18185865 DOI: 10.1039/b712834g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The redox behaviour, optical-absorption spectra and emission properties of U-shaped and elongated disubstituted biisoquinoline ligands and of derived octahedral Fe(ii), Ru(ii), and Re(i) complexes are reported. The ligands are 8,8'-dichloro-3,3'-biisoquinoline (1), 8,8'-dianisyl-3,3'-biisoquinoline (2), and 8,8'-di(phenylanisyl)-3,3'-biisoquinoline (3), and the complexes are [Fe(3)(3)](2+), [Fe(2)(3)](2+), [Ru(1)(phen)(2)](2+), [Ru(2)(3)](2+), [Ru(3)(3)](2+), [Re(2)(py)(CO)(3)](+), and [Re()(py)(CO)(3)](+). For the ligands, the optical properties as observed in dichloromethane are in line with expectations based on the predominant (1)pipi* nature of the involved excited states, with contributions at lower energies from (1)npi* and (1)ILCT (intraligand charge transfer) transitions. For all of the Fe(ii), Ru(ii), and Re(i) complexes, studied in acetonitrile, the transitions associated with the lowest-energy absorption band are of (1)MLCT (metal-to-ligand charge transfer) nature. The emission properties, as observed at room temperature and at 77 K, can be described as follows: (i) the Fe(ii) complexes do not emit, either at room temperature or at 77 K; (ii) the room-temperature emission of the Ru(ii) complexes (phi(em) > 10(-3), tau in the micros range) is of mixed (3)MLCT/(3)LC character (and similarly at 77 K); and (iii) the room-temperature emission of the Re(i) complexes (phi(em) approximately 3 x 10(-3), tau < 1 ns) is of (3)MLCT character and becomes of (3)LC (ligand-centered) character (tau in the ms time scale) at 77 K. The interplay of the involved excited states in determining the luminescence output is examined.
Collapse
Affiliation(s)
- Barbara Ventura
- Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Via P. Gobetti 101, 40129, Bologna, Italy.
| | | | | | | | | | | |
Collapse
|
20
|
Hu XY, Liu XJ, Feng JK. Theoretical Investigation on the Absorption and Emission Properties of the Three Isomers of Bis(thiocyanato)(2,2′-bipyridyl)platinum(II). CHINESE J CHEM 2007. [DOI: 10.1002/cjoc.200790254] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
21
|
Mochida T, Shimizu H, Okazawa K. Synthesis and structures of platinum(II) complexes with 5-ferrocenylpyrimidine. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.09.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
22
|
Kato M, Kozakai M, Fukagawa C, Funayama T, Yamauchi S. Luminescence Properties and Assembled Structures of Dicyano(Diimine) Platinum(II) Complexes in Glassy Solution. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587250008023499] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Masako Kato
- a Division of Material Science , Graduate School of Human Culture, Nara Women's University , Nara , 630-8506 , Japan
- b PRESTO, JST , Kawaguchi , 332-0012 , Japan
| | | | | | - Tomoyo Funayama
- d Institute for Chemical Reaction Science, Tohoku University , Sendai , 980-8577 , Japan
| | - Seigo Yamauchi
- d Institute for Chemical Reaction Science, Tohoku University , Sendai , 980-8577 , Japan
| |
Collapse
|
23
|
Chang SY, Kavitha J, Li SW, Hsu CS, Chi Y, Yeh YS, Chou PT, Lee GH, Carty AJ, Tao YT, Chien CH. Platinum(II) Complexes with Pyridyl Azolate-Based Chelates: Synthesis, Structural Characterization, and Tuning of Photo- and Electrophosphorescence. Inorg Chem 2005; 45:137-46. [PMID: 16390049 DOI: 10.1021/ic051393b] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new series of luminescent platinum(II) azolate complexes with a formula of [Pt(NwedgeN)(2)], in which NwedgeN = mppz (1), bppz (2a), bzpz (2b), bmpz (2c), bqpz (2d), fppz (3a), hppz (3b), bptz (4), hptz (5), were synthesized, and their photophyscial properties were examined. Single-crystal X-ray diffraction studies of 2c and 3b revealed a planar molecular geometry, in which the NwedgeN chelates adopt a trans configuration and show notable interligand C-H...N hydrogen bonding within the complex. Interesting intermolecular interactions were observed in the solid state. Complex 2c formed a slipped-stack structure with a Pt...Pt separation distance of 6.432 Angstroms, while complex 3b showed a columnar stacking with the molecules oriented in an alternating order in relation to the chain axis, giving a much reduced Pt...Pt distance of 3.442 Angstroms. The lowest absorption band for all complexes revealed strong state mixings between the singlet and triplet (MLCT and intraligand pipi) manifolds. Complexes 1 and 2 showed mixed (3)MLCT and (3)pipi phosphorescence in fluid solution. While radiationless deactivation was apparently dominant for complexes 3-5 in solution, resulting in rather weak emission, strong phosphorescence was observed in the room-temperature solid state with the peak wavelength being significantly red shifted compared to that in solution. The emission nature has been tentatively assigned to be (3)MMLCT in character. OLED devices with a multilayer configuration of ITO/NPB/CBP:2a/BCP/Alq(3)/LiF/Al were successfully fabricated using a CBP layer doped with various amount of 2a, ranging from 6 to 100%, as the emitting layer. A substantial red shift with increasing doping concentrations was observed in electroluminescence. With a neat film of 2a, the device showed a green emission with lambda(max) at 556 nm and an external QE of approximately 1.6% at a driving current of 20 mA. Similarly, for the device using a neat film of 3a, an electroluminescence centered at 616 nm with a slightly reduced external QE of approximately 2.1% was recorded. Aggregation of platinum(II) complexes in the solid state was proposed to account for the large red-shift in electroluminescence.
Collapse
Affiliation(s)
- Sheng-Yuan Chang
- Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Casas JS, Castiñeiras A, García-Martínez E, Parajó Y, Pérez-Parallé ML, Sánchez-González A, Sordo J. Synthesis and Cytotoxicity of 2-(2′-Pyridyl)benzimidazole Complexes of Palladium(II) and Platinum(II). Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200570054] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
25
|
π⋯π Interaction assembled silver(I) complexes with the ligand 4′,5′-diaza-9′-(4,5-disubstituted-1,3-dithiol-2-ylidene)fluorene. Polyhedron 2004. [DOI: 10.1016/j.poly.2004.07.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
26
|
Dai J, Yang W, Ren ZG, Zhu QY, Jia DX. Copper(I) and palladium(II) complexes of 4,5-bis(methylthio)-1,3-dithiole-2-thione, coordination and S⋯S contact assembled ribbon structures. Polyhedron 2004. [DOI: 10.1016/j.poly.2004.03.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
27
|
Ueda M, Mochida T, Itou M, Asanagi N, Mori H. Mononuclear platinum(II) complexes coordinated by pyridyl nitronyl nitroxide radicals: structures and magnetic properties of trans-[Pt(NH3)2(NITpPy)2](NO3)2 and cis-[PtCl2(NIToPy)2]. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(02)01513-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
28
|
Holloway, CE, Melnik, M. Structural Aspect of Platinum Coordination Compounds: Part II. Monomeric Pt11 Compounds with PtA3B and PtA2B2 Composition. REV INORG CHEM 2003. [DOI: 10.1515/revic.2003.23.2-3.125] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
29
|
Holloway, CE, Melnik, M. STRUCTURAL ASPECT OF PLATINUM COORDINATION COMPOUNDS: PART I. MONOMERIC PT0, PT1 AND PTIIA4 DERIVATIVES. REV INORG CHEM 2002. [DOI: 10.1515/revic.2002.22.3-4.163] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
30
|
Wang K, Haga M, Monjushiro H, Akiba M, Sasaki Y. Luminescent Langmuir-Blodgett films of platinum(II) complex [Pt(L18)Cl](PF6) (L18 = 2,6-bis(1-octadecylbenzimidazol-2-yl)pyridine). Inorg Chem 2000; 39:4022-8. [PMID: 11198856 DOI: 10.1021/ic990880m] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel amphiphilic Pt complex containing 2,6-bis(1-octadecylbenzimidazol-2-yl)pyridine (L18), [Pt(L18)Cl](PF6), has been synthesized. The complex exhibits concentration-dependent absorption and emission spectra in solution. With increasing the concentration of the Pt complex, we observed a new absorption band centered at 550 nm derived from a metal-metal d sigma* to ligand pi* charge transfer (MMLCT) transition and the corresponding broad emission centered at 650 nm. The Pt complex is surface-active, and the surface pressure-area isotherm reveals three phase transitions. The three phases correspond to one liquid-expanding phase and two solid-condensed phases, respectively, with different intermolecular overlap in the "flat-on" orientation at the air-water interface. Without additives such as fatty acids, the complex forms a stable and reproducible Langmuir-Blodgett (LB) multilayer film above a surface pressure of 15 mN m-1. Strong emission from the LB films, even monolayer, was observed. Comparing the relative emission intensity of the MMLCT band for transferred LB monolayer film with that for cast films, we concluded that Pt-Pt interactions are suppressed in the LB film. Instead, the emission at 600 nm arising from the ligand-ligand pi-pi interacted excited state became dominant. The results would provide the insight into the control of molecular ordering for planar Pt complexes from the viewpoint of characteristic excited states.
Collapse
Affiliation(s)
- K Wang
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-Ku, Tokyo 112-8551, Japan
| | | | | | | | | |
Collapse
|
31
|
Yip JH, Vittal JJ. Syntheses and electronic spectroscopy of [PtL(L')][ClO4] complexes (HL = 6-phenyl-2,2'-bipyridine; L' = pyridine, 4-aminopyridine, 2-aminopyridine, and 2,6-diaminopyridine). Inorg Chem 2000; 39:3537-43. [PMID: 11196812 DOI: 10.1021/ic9913482] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Four cyclometalated Pt(II) complexes, [PtL(L')][ClO4] [HL = 6-phenyl-2,2'-bipyridine; L' = pyridine (1), 4-aminopyridine (2), 2-aminopyridine (3), 2,6-diaminopyridine (4)], were designed and synthesized to probe intramolecular N...Pt interactions. The crystal structures of the compounds show that the pyridine ligands are almost perpendicular to the planes of the molecules. In addition, the pendant NH2 groups of the 2-aminopyridine and 2,6-diaminopyridine ligands are close to the metal centers in complexes 3 and 4, with the Pt-N(H2) distances (3.065(3)-3.107(3) A) significantly shorter than the sum of the van der Waals radii of Pt and N. These compounds were also studied by electronic spectroscopy. All the complexes display intense intraligand pi-->pi* transitions at 200-340 nm (epsilon = 10(4)-10(3) M-1 cm-1) and moderately intense (epsilon approximately 10(3) M-1 cm-1) metal (Pt)-to-ligand (pi*) charge-transfer (MLCT) transitions. For 1 and 2, the MLCT transitions occur at approximately 390 nm, but the MLCT transition of 4 is exceptionally low in energy (492 nm). The low-temperature emission spectra of the complexes in frozen EMD glass indicate that 3 pi pi* is the emissive excited state for 1 and 2 but the emission of 3 is from a 3MLCT excited state. On the basis of the spectroscopic results, the order of energy of the MLCT excited states is established as 1 approximately 2 > 3 > 4. It is proposed that the red shifts of the MLCT transitions in 3 and 4 are due to increased electron-donating abilities of the ancillary pyridine ligands and intramolecular interactions between the orbitals of amine nitrogen lone pairs. Crystal data for the complexes are as follows. 1: triclinic P1, Z = 2, a = 8.7917(2) A, b = 10.6398(3) A, c = 11.9592(3) A, alpha = 107.130(1) degrees, beta = 92.522(1) degrees, gamma = 111.509(1) degrees. 2.CH3CN: triclinic P1, Z = 2, a = 7.0122(4) A, b = 12.9653(8) A, c = 14.0283(9) A, alpha = 107.3100(10) degrees, beta = 102.7640(10) degrees, gamma = 91.6320(10) degrees. 3.CH3CN: triclinic P1, Z = 2, a = 7.6459(1) A, b = 10.8433(1) A, c = 14.8722(2) A, alpha = 99.383(1) degrees, beta = 93.494(1) degrees, gamma = 101.385(1) degrees. 4.CH3CN: triclinic P1, Z = 2, a = 7.862(2) A, b = 10.977(3) A, c = 14.816(5) A, alpha = 99.34(2) degrees, beta = 92.64(2) degrees, gamma = 104.11(2) degrees.
Collapse
Affiliation(s)
- J H Yip
- Department of Chemistry, National University of Singapore, 10 Kent Ridge Crescent, 119260 Singapore.
| | | |
Collapse
|
32
|
Funayama T, Kato M, Kosugi H, Yagi M, Higuchi J, Yamauchi S. Studies of the Lowest Excited Triplet State of 3,3′-Biisoquinoline(dicyano)platinum(II) [Pt(CN)2(i-biq)] by Means of Time-Resolved Electron Paramagnetic Resonance and Optical Spectroscopy. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2000. [DOI: 10.1246/bcsj.73.1541] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
33
|
Crystal structures and spectroscopic properties of platina-β-diketones — a new mode of stacking in platinum complexes. J Organomet Chem 2000. [DOI: 10.1016/s0022-328x(99)00726-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
34
|
Kato M, Kosuge C, Morii K, Ahn JS, Kitagawa H, Mitani T, Matsushita M, Kato T, Yano S, Kimura M. Luminescence Properties and Crystal Structures of Dicyano(diimine)platinum(II) Complexes Controlled by Pt···Pt and π−π Interactions. Inorg Chem 1999. [DOI: 10.1021/ic981027a] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Masako Kato
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan, Institute for Molecular Science, Okazaki 444-8585, Japan, and Japan Advanced Institute of Science and Technology, Hokuriku, Tatsunokuchi, 923-1292, Japan
| | - Chizuko Kosuge
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan, Institute for Molecular Science, Okazaki 444-8585, Japan, and Japan Advanced Institute of Science and Technology, Hokuriku, Tatsunokuchi, 923-1292, Japan
| | - Katsuyuki Morii
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan, Institute for Molecular Science, Okazaki 444-8585, Japan, and Japan Advanced Institute of Science and Technology, Hokuriku, Tatsunokuchi, 923-1292, Japan
| | - Jeung Sun Ahn
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan, Institute for Molecular Science, Okazaki 444-8585, Japan, and Japan Advanced Institute of Science and Technology, Hokuriku, Tatsunokuchi, 923-1292, Japan
| | - Hiroshi Kitagawa
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan, Institute for Molecular Science, Okazaki 444-8585, Japan, and Japan Advanced Institute of Science and Technology, Hokuriku, Tatsunokuchi, 923-1292, Japan
| | - Tadaoki Mitani
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan, Institute for Molecular Science, Okazaki 444-8585, Japan, and Japan Advanced Institute of Science and Technology, Hokuriku, Tatsunokuchi, 923-1292, Japan
| | - Michio Matsushita
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan, Institute for Molecular Science, Okazaki 444-8585, Japan, and Japan Advanced Institute of Science and Technology, Hokuriku, Tatsunokuchi, 923-1292, Japan
| | - Tatsuhisa Kato
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan, Institute for Molecular Science, Okazaki 444-8585, Japan, and Japan Advanced Institute of Science and Technology, Hokuriku, Tatsunokuchi, 923-1292, Japan
| | - Shigenobu Yano
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan, Institute for Molecular Science, Okazaki 444-8585, Japan, and Japan Advanced Institute of Science and Technology, Hokuriku, Tatsunokuchi, 923-1292, Japan
| | - Masaru Kimura
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan, Institute for Molecular Science, Okazaki 444-8585, Japan, and Japan Advanced Institute of Science and Technology, Hokuriku, Tatsunokuchi, 923-1292, Japan
| |
Collapse
|
35
|
Neve F, Crispini A, Campagna S. Anisometric Cyclometalated Palladium(II) and Platinum(II) Complexes. Structural and Photophysical Studies. Inorg Chem 1997. [DOI: 10.1021/ic9703540] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Francesco Neve
- Dipartimento di Chimica, Università della Calabria, I-87030 Arcavacata di Rende (CS), Italy
| | - Alessandra Crispini
- Dipartimento di Chimica, Università della Calabria, I-87030 Arcavacata di Rende (CS), Italy
| | - Sebastiano Campagna
- Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina, via Sperone 31, I-98166 Messina, Italy
| |
Collapse
|
36
|
Affiliation(s)
- William B. Connick
- Contribution from the Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - Harry B. Gray
- Contribution from the Beckman Institute, California Institute of Technology, Pasadena, California 91125
| |
Collapse
|
37
|
|
38
|
Büchner R, Field JS, Haines RJ, Cunningham CT, McMillin DR. Luminescence Properties of Salts of the [Pt(trpy)Cl]+ and [Pt(trpy)(MeCN)]2+ Chromophores: Crystal Structure of [Pt(trpy)(MeCN)](SbF6)2. Inorg Chem 1997. [DOI: 10.1021/ic961068b] [Citation(s) in RCA: 147] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
39
|
Connick WB, Marsh RE, Schaefer WP, Gray HB. Linear-Chain Structures of Platinum(II) Diimine Complexes. Inorg Chem 1997. [DOI: 10.1021/ic961232v] [Citation(s) in RCA: 295] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- William B. Connick
- Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - Richard E. Marsh
- Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - William P. Schaefer
- Beckman Institute, California Institute of Technology, Pasadena, California 91125
| | - Harry B. Gray
- Beckman Institute, California Institute of Technology, Pasadena, California 91125
| |
Collapse
|
40
|
|
41
|
Navarro JAR, Romero MA, Salas JM, Quirós M, El Bahraoui J, Molina J. Binuclear Platinum(II) Triazolopyrimidine Bridged Complexes. Preparation, Crystal Structure, NMR Spectroscopy, and ab Initio MO Investigation on the Bonding Nature of the Pt(II)···Pt(II) Interaction in the Model Compound {Pt2[NHCHN(C(CH2)(CH3))]4}. Inorg Chem 1996. [DOI: 10.1021/ic960496e] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jorge A. R. Navarro
- Departamento de Química Inorgánica and Laboratorio de Modelización y Diseño Molecular, Universidad de Granada, 18071 Granada, Spain
| | - M. Angustias Romero
- Departamento de Química Inorgánica and Laboratorio de Modelización y Diseño Molecular, Universidad de Granada, 18071 Granada, Spain
| | - Juan M. Salas
- Departamento de Química Inorgánica and Laboratorio de Modelización y Diseño Molecular, Universidad de Granada, 18071 Granada, Spain
| | - Miguel Quirós
- Departamento de Química Inorgánica and Laboratorio de Modelización y Diseño Molecular, Universidad de Granada, 18071 Granada, Spain
| | - Jaouad El Bahraoui
- Departamento de Química Inorgánica and Laboratorio de Modelización y Diseño Molecular, Universidad de Granada, 18071 Granada, Spain
| | - José Molina
- Departamento de Química Inorgánica and Laboratorio de Modelización y Diseño Molecular, Universidad de Granada, 18071 Granada, Spain
| |
Collapse
|