1
|
Konarev DV, Kuzmin AV, Khasanov SS, Litvinov AL, Otsuka A, Yamochi H, Kitagawa H, Lyubovskaya RN. Dianionic Titanyl and Vanadyl (Cation + ) 2 [M IV O(Pc 4- )] 2- Phthalocyanine Salts Containing Pc 4- Macrocycles. Chem Asian J 2018; 13:1552-1560. [PMID: 29771008 DOI: 10.1002/asia.201701754] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/25/2018] [Indexed: 11/10/2022]
Abstract
In this study, the titanyl and vanadyl phthalocyanine (Pc) salts (Bu4 N+ )2 [MIV O(Pc4- )]2- (M=Ti, V) and (Bu3 MeP+ )2 [MIV O(Pc4- )]2- (M=Ti, V) with [MIV O(Pc4- )]2- dianions were synthesized and characterized. Reduction of MIV O(Pc2- ) carried out with an excess of sodium fluorenone ketyl in the presence of Bu4 N+ or Bu3 MeP+ is exclusive to the phthalocyanine centers, forming Pc4- species. During reduction, the metal +4 charge did not change, implying that Pc is an non-innocent ligand. The Pc negative charge increase caused the C-N(pyr) bonds to elongate and the C-N(imine) bonds to alternate, thus increasing the distortion of Pc. Jahn-Teller effects are significant in the [eg(π*)]2 dianion ground state and can additionally distort the Pc macrocycles. Blueshifts of the Soret and Q-bands were observed in the UV/Vis/NIR when MIV O(Pc2- ) was reduced to [MIV O(Pc.3- )].- and [MIV O(Pc4- )]2- . From magnetic measurements, [TiIV O(Pc4- )]2- was found to be diamagnetic and (Bu4 N+ )2 [VIV O(Pc4- )]2- and (Bu3 MeP+ )2 [VIV O(Pc4- )]2- were found to have magnetic moments of 1.72-1.78 μB corresponding to an S=1/2 spin state owing to VIV electron spin. As a result, two latter salts show EPR signals with VIV hyperfine coupling.
Collapse
Affiliation(s)
- Dmitri V Konarev
- Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow region, 142432, Russia
| | - Alexey V Kuzmin
- Institute of Solid State Physics RAS, Chernogolovka, Moscow region, 142432, Russia
| | - Salavat S Khasanov
- Institute of Solid State Physics RAS, Chernogolovka, Moscow region, 142432, Russia
| | - Alexey L Litvinov
- Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow region, 142432, Russia
| | - Akihiro Otsuka
- Division of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan.,Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hideki Yamochi
- Division of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan.,Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hiroshi Kitagawa
- Division of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Rimma N Lyubovskaya
- Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow region, 142432, Russia
| |
Collapse
|
2
|
Konarev DV, Faraonov MA, Kuzmin AV, Fatalov AM, Osipov NG, Khasanov SS, Shestakov AF, Lyubovskaya RN. Molecular Structure, Optical and Magnetic Properties of Dianionic Free-Base Tetrapyrazinoporphyrazine Macrocycle. ChemistrySelect 2018. [DOI: 10.1002/slct.201800739] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Dmitri V. Konarev
- Institute of Problems of Chemical Physics RAS; Chernogolovka, Moscow region 142432 Russia
| | - Maxim A. Faraonov
- Institute of Problems of Chemical Physics RAS; Chernogolovka, Moscow region 142432 Russia
| | - Alexey V. Kuzmin
- Institute of Solid State Physics RAS; Chernogolovka, Moscow region 142432 Russia
| | - Alexey M. Fatalov
- Institute of Problems of Chemical Physics RAS; Chernogolovka, Moscow region 142432 Russia
- Moscow State University; Leninskie Gory 119991 Moscow Russia
| | - Nikita G. Osipov
- Institute of Problems of Chemical Physics RAS; Chernogolovka, Moscow region 142432 Russia
- Moscow State University; Leninskie Gory 119991 Moscow Russia
| | - Salavat S. Khasanov
- Institute of Solid State Physics RAS; Chernogolovka, Moscow region 142432 Russia
| | - Alexander F. Shestakov
- Institute of Problems of Chemical Physics RAS; Chernogolovka, Moscow region 142432 Russia
| | - Rimma N. Lyubovskaya
- Institute of Problems of Chemical Physics RAS; Chernogolovka, Moscow region 142432 Russia
| |
Collapse
|
3
|
Konarev DV, Kuzmin AV, Khasanov SS, Batov MS, Otsuka A, Yamochi H, Kitagawa H, Lyubovskaya RN. Salts with titanyl and vanadyl phthalocyanine radical anions. Molecular design and effect of cations on the structure and magnetic and optical properties. CrystEngComm 2018. [DOI: 10.1039/c7ce01918a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Our recent data on radical anion salts of titanyl (TiIVOPc) and vanadyl (VIVOPc) phthalocyanines as well as additional new data are summarized.
Collapse
Affiliation(s)
- Dmitri V. Konarev
- Institute of Problems of Chemical Physics RAS
- Chernogolovka
- 142432 Russia
| | | | | | - Mikhail S. Batov
- Institute of Problems of Chemical Physics RAS
- Chernogolovka
- 142432 Russia
- Moscow State University
- Russia
| | - Akihiro Otsuka
- Division of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto 606-8502
- Japan
| | - Hideki Yamochi
- Division of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto 606-8502
- Japan
| | - Hiroshi Kitagawa
- Division of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto 606-8502
- Japan
| | | |
Collapse
|
4
|
Balakrishnan G, Soldatova A, Reid PJ, Spiro TG. Ultrafast charge transfer in nickel phthalocyanine probed by femtosecond Raman-induced Kerr effect spectroscopy. J Am Chem Soc 2014; 136:8746-54. [PMID: 24841906 PMCID: PMC4136751 DOI: 10.1021/ja503541v] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Indexed: 12/19/2022]
Abstract
The recently developed technique of femtosecond stimulated Raman spectroscopy, and its variant, femtosecond Raman-induced Kerr effect spectroscopy (FRIKES), offer access to ultrafast excited-state dynamics via structurally specific vibrational spectra. We have used FRIKES to study the photoexcitation dynamics of nickel(II) phthalocyanine with eight butoxy substituents, NiPc(OBu)8. NiPc(OBu)8 is reported to have a relatively long-lived ligand-to-metal charge-transfer (LMCT) state, an essential characteristic for efficient electron transfer in photocatalysis. Following photoexcitation, vibrational transitions in the FRIKES spectra, assignable to phthalocyanine ring modes, evolve on the femtosecond to picosecond time scales. Correlation of ring core size with the frequency of the ν10 (asymmetric C-N stretching) mode confirms the identity of the LMCT state, which has a ∼500 ps lifetime, as well as that of a precursor d-d excited state. An even earlier (∼0.2 ps) transient is observed and tentatively assigned to a higher-lying Jahn-Teller-active LMCT state. This study illustrates the power of FRIKES spectroscopy in elucidating ultrafast molecular dynamics.
Collapse
Affiliation(s)
- Gurusamy Balakrishnan
- Department of Chemistry, University
of Washington, Seattle, Washington 98195, United States
| | - Alexandra
V. Soldatova
- Department of Chemistry, University
of Washington, Seattle, Washington 98195, United States
| | - Philip J. Reid
- Department of Chemistry, University
of Washington, Seattle, Washington 98195, United States
| | - Thomas G. Spiro
- Department of Chemistry, University
of Washington, Seattle, Washington 98195, United States
| |
Collapse
|