51
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Shah HH, Al-Balushi RA, Al-Suti MK, Khan MS, Woodall CH, Molloy KC, Raithby PR, Robinson TP, Dale SEC, Marken F. Long-Range Intramolecular Electronic Communication in Bis(ferrocenylethynyl) Complexes Incorporating Conjugated Heterocyclic Spacers: Synthesis, Crystallography, and Electrochemistry. Inorg Chem 2013; 52:4898-908. [DOI: 10.1021/ic3024887] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hakikulla H. Shah
- Department of Chemistry, Sultan Qaboos University, P.O. Box 36, Al-Khodh 123, Sultanate
of Oman
| | - Rayya A. Al-Balushi
- Department of Chemistry, Sultan Qaboos University, P.O. Box 36, Al-Khodh 123, Sultanate
of Oman
| | - Mohammed K. Al-Suti
- Department of Chemistry, Sultan Qaboos University, P.O. Box 36, Al-Khodh 123, Sultanate
of Oman
| | - Muhammad S. Khan
- Department of Chemistry, Sultan Qaboos University, P.O. Box 36, Al-Khodh 123, Sultanate
of Oman
| | | | | | - Paul R. Raithby
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K
| | | | - Sara E. C. Dale
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K
| | - Frank Marken
- Department
of Chemistry, University of Bath, Bath BA2 7AY, U.K
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52
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Kwon JS, Yang M. Computational Study on the Dependence of Electronic Transition Energies of Porphin, Chlorin, Mg-Chlorin and Chlorophyll a on an External Charge. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.2.453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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53
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Lu Z, Abbina S, Sabin JR, Nemykin VN, Du G. Unexpected Formation of Chiral Pincer CNN Nickel Complexes with β-Diketiminato Type Ligands via C–H Activation: Synthesis, Properties, Structures, and Computational Studies. Inorg Chem 2013; 52:1454-65. [DOI: 10.1021/ic3021904] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Zhengliang Lu
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop
9024, Grand Forks, North Dakota 58202, United States
| | - Srinivas Abbina
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop
9024, Grand Forks, North Dakota 58202, United States
| | - Jared R. Sabin
- Department of Chemistry & Biochemistry, University of Minnesota Duluth, 1039 University Drive, Duluth, Minnesota 55812, United States
| | - Victor N. Nemykin
- Department of Chemistry & Biochemistry, University of Minnesota Duluth, 1039 University Drive, Duluth, Minnesota 55812, United States
| | - Guodong Du
- Department of Chemistry, University of North Dakota, 151 Cornell Street Stop
9024, Grand Forks, North Dakota 58202, United States
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54
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Modulating the electronic properties of asymmetric push–pull and symmetric Zn(II)-diarylporphyrinates with para substituted phenylethynyl moieties in 5,15 meso positions: A combined electrochemical and spectroscopic investigation. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.08.039] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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55
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Sabin JR, Varzatskii OA, Voloshin YZ, Starikova ZA, Novikov VV, Nemykin VN. Insight into the electronic structure, optical properties, and redox behavior of the hybrid phthalocyaninoclathrochelates from experimental and density functional theory approaches. Inorg Chem 2012; 51:8362-72. [PMID: 22800298 DOI: 10.1021/ic3008798] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An insight into the electronic structure of several hafnium(IV), zirconium(IV), and lutetium(III) phthalocyaninoclathrochelates has been discussed on the basis of experimental UV-vis, MCD, electro- and spectroelectrochemical data as well as density functional theory (DFT) and time-dependent DFT (TDDFT) calculations. On the basis of UV-vis and MCD spectroscopy as well as theoretical predictions, it was concluded that the electronic structure of the phthalocyninoclathrochelates can be described in the first approximation as a superposition of the weakly interacting phthalocyanine and clathrochelate substituents. Spectroelectrochemical data and DFT calculations clearly confirm that the highest occupied molecular orbital (HOMO) in all tested complexes is localized on the phthalocyanine ligand. X-ray crystallography on zirconium(IV) and earlier reported hafnium(IV) phthalocyaninoclathrochelate complexes revealed a slightly distorted phthalocyanine conformation with seven-coordinated metal center positioned ∼1 Å above macrocyclic cavity. The geometry of the encapsulated iron(II) ion in the clathrochelate fragment was found to be between trigonal-prismatic and trigonal-antiprismatic.
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Affiliation(s)
- Jared R Sabin
- Department of Chemistry & Biochemistry, 1039 University Drive, University of Minnesota Duluth, Duluth, Minnesota 55812, United States
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56
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Nemykin VN, Sabin JR. Profiling energetics and spectroscopic signatures in prototropic tautomers of asymmetric phthalocyanine analogues. J Phys Chem A 2012; 116:7364-71. [PMID: 22691046 DOI: 10.1021/jp304386x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Density functional theory (DFT) and time-dependent density functional theory (TDDFT) were used to explain discrepancies in UV-vis and MCD spectra of the metal-free tribenzo[b,g,l]thiopheno[3,4-q]porphyrazine (1), substituted tribenzo[b,g,l]porphyrazine (2), and 2,3-bis(methylcarboxyl)phthalocyanine (3). On the basis of gas-phase and polarized continuum solvation model (PCM) DFT and TDDFT calculations, it was suggested that both NH tautomers contribute to the spectroscopic signature of 1, whereas the Q-band region of 2 and 3 is dominated by a single NH tautomer. For all tested compounds, it was found that the combination of the BP86 exchange-correlation functional, 6-31G(d) basis set, and TDDFT-PCM approach provides the best accuracy in energies of the Q(x)- and Q(y)-bands of the individual NH tautomers as well as correctly describes their relative energy differences, which are important in understanding of experimental spectroscopy of the target systems.
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Affiliation(s)
- Victor N Nemykin
- Department of Chemistry and Biochemistry, 1039 University Drive, University of Minnesota, Duluth, Minnesota 55812, United States.
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57
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Solntsev PV, Spurgin KL, Sabin JR, Heikal AA, Nemykin VN. Photoinduced charge transfer in short-distance ferrocenylsubphthalocyanine dyads. Inorg Chem 2012; 51:6537-47. [PMID: 22651219 DOI: 10.1021/ic3000608] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two new ferrocenylsubphthalocyanine dyads with ferrocenylmethoxide (2) and ferrocenecarboxylate (3) substituents directly attached to the subphthalocyanine ligand via the axial position have been prepared and characterized using NMR, UV-vis, and magnetic circular dichroism (MCD) spectroscopies as well as X-ray crystallography. The redox properties of the ferrocenyl-containing dyads 2 and 3 were investigated using the cyclic voltammetry (CV) approach and compared to those of the parent subphthalocyanine 1. CV data reveal that the first reversible oxidation is ferrocene-centered, while the second oxidation and the first reduction are localized on the subphthalocyanine ligand. The electronic structures and nature of the optical bands observed in the UV-vis and MCD spectra of all target compounds were investigated by a density functional theory polarized continuum model (DFT-PCM) and time-dependent (TD)DFT-PCM approaches. It has been found that in both dyads the highest occupied molecular orbital (HOMO) to HOMO-2 are ferrocene-centered molecular orbitals, while HOMO-3 as well as lowest unoccupied molecular orbital (LUMO) and LUMO+1 are localized on the subphthalocyanine ligand. TDDFT-PCM data on complexes 1-3 are consistent with the experimental observations, which indicate the dominance of π-π* transitions in the UV-vis spectra of 1-3. The excited-state dynamics of the dyads 2 and 3 were investigated using time-correlated single photon counting, which indicates that fluorescence quenching is more efficient in dyad 3 compared to dyad 2. These fluorescence lifetime measurements were interpreted on the basis of DFT-PCM calculations.
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Affiliation(s)
- Pavlo V Solntsev
- Department of Chemistry and Biochemistry, University of Minnesota-Duluth, 1039 University Drive, Duluth, Minnesota 55812, USA
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58
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Lamsabhi AM, Yáñez M, Mó O, Trujillo C, Blanco F, Alkorta I, Elguero J, Caballero E, Rodríguez-Morgade MS, Claessens CG, Torres T. TDDFT study of the UV-vis spectra of subporphyrazines and subphthalocyanines. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424611004154] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The UV-vis spectra of a series of subporphyrazines, SubPz(A,R), and subphthalocyanines, SubPc(A,R) ( A = F, Cl; R = H, F, CH3, C3H7, SCH3, SC2H5 and SPh), where A is the substituent attached to the central boron atom and R is the substituent attached to the periphery of the molecule have been analyzed through the use of TD–DFT calculations in vacuum and using chloroform as a solvent. The absorption spectra depend on both, the characteristics of the substituent attached to the periphery of the molecule and the extension of the π-system on going from SubPz to the SubPc analog. These latter effects lead to a red-shift of both the Q-band and the B-band, although the effect is larger for the former, mainly due to the increase of HOMO–LUMO energy gap on going from the SubPz to the SubPc analog. The effect of the substituents R is more intricate, because the profile of the absorption spectra changes depending on whether both substituents are on the same side (uu or dd) or on opposite sides (ud) of the molecular cone. Since the three conformers are rather close in energy, the observed spectra correspond, very likely, to the sum of the spectra of all of them.
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Affiliation(s)
- Al Mokhtar Lamsabhi
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain
| | - Manuel Yáñez
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain
| | - Otilia Mó
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain
| | - Cristina Trujillo
- Instituto de Química Médica (CSIC); Juan de la Cierva, 3, 28006 Madrid, Spain
| | - Fernando Blanco
- Instituto de Química Médica (CSIC); Juan de la Cierva, 3, 28006 Madrid, Spain
| | - Ibon Alkorta
- Instituto de Química Médica (CSIC); Juan de la Cierva, 3, 28006 Madrid, Spain
| | - Jose Elguero
- Instituto de Química Médica (CSIC); Juan de la Cierva, 3, 28006 Madrid, Spain
| | - Esmeralda Caballero
- Departamento de Química Orgánica, Módulo 1, Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain
| | - M. Salomé Rodríguez-Morgade
- Departamento de Química Orgánica, Módulo 1, Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain
| | - Christian G. Claessens
- Departamento de Química Orgánica, Módulo 1, Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain
| | - Tomás Torres
- Departamento de Química Orgánica, Módulo 1, Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain
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59
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Ziegler CJ, Sabin JR, Geier GR, Nemykin VN. The first TDDFT and MCD studies of free base triarylcorroles: A closer look into solvent-dependent UV-visible absorption. Chem Commun (Camb) 2012; 48:4743-5. [DOI: 10.1039/c2cc31146a] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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60
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Nemykin VN, Polshyna AE, Makarova EA, Kobayashi N, Lukyanets EA. Unexpected formation of the nickel seco-tribenzoporphyrazine with a tribenzotetraazachlorin-type absorption spectrum. Chem Commun (Camb) 2012; 48:3650-2. [DOI: 10.1039/c2cc30760j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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61
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Vecchi A, Gatto E, Floris B, Conte V, Venanzi M, Nemykin VN, Galloni P. Tetraferrocenylporphyrins as active components of self-assembled monolayers on gold surface. Chem Commun (Camb) 2012; 48:5145-7. [DOI: 10.1039/c2cc31052j] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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62
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Sripothongnak S, Ziegler CJ, Dahlby MR, Nemykin VN. Controllable and Reversible Inversion of the Electronic Structure in NickelN-Confused Porphyrin: A Case When MCD Matters. Inorg Chem 2011; 50:6902-9. [DOI: 10.1021/ic102255k] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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63
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Solntsev PV, Dudkin SV, Sabin JR, Nemykin VN. Electronic Communications in (Z)-Bis(ferrocenyl)ethylenes with Electron-Withdrawing Substituents. Organometallics 2011. [DOI: 10.1021/om2001266] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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64
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Density functional theory studies on the structures and electronic communication of meso-ferrocenylporphyrins: Long range orbital coupling via porphyrin core. J Mol Graph Model 2011; 29:717-25. [DOI: 10.1016/j.jmgm.2010.12.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Revised: 12/05/2010] [Accepted: 12/07/2010] [Indexed: 11/22/2022]
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65
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Rohde GT, Sabin JR, Barrett CD, Nemykin VN. Long-range metal–metal coupling in transition-metal 5,10,15,20-tetraferrocenylporphyrins. NEW J CHEM 2011. [DOI: 10.1039/c1nj20145j] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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