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Synthesis of soft-core hard-shell nanoparticles by visible PET-RAFT polymerization in dispersion conditions. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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2
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Cordones AA, Pemmaraju CD, Lee JH, Zegkinoglou I, Ragoussi ME, Himpsel FJ, de la Torre G, Schoenlein RW. Excited-State Charge Distribution of a Donor-π-Acceptor Zn Porphyrin Probed by N K-Edge Transient Absorption Spectroscopy. J Phys Chem Lett 2021; 12:1182-1188. [PMID: 33480697 DOI: 10.1021/acs.jpclett.0c03725] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Zinc porphyrin solar cell dyes with donor-π-acceptor architectures combine light absorber (π), electron-donor, and electron-acceptor moieties inside a single molecule with atomic precision. The donor-π-acceptor design promotes the separation of charge carriers following optical excitation. Here, we probe the excited-state electronic structure within such molecules by combining time-resolved X-ray absorption spectroscopy at the N K-edge with first-principles time-dependent density functional theory (TD-DFT) calculations. Customized Zn porphyrins with strong-donor triphenylamine groups or weak-donor tri-tert-butylbenzene groups were synthesized. Energetically well-separated N K-edge absorption features simultaneously probe the excited-state electronic structure from the perspectives of the macrocycle and triphenylamine N atoms. New absorption transitions between the macrocycle N atoms and the excited-state HOMO vacancy are observed, and the triphenylamine associated absorption feature blue-shifts, consistent with partial oxidation of the donor groups in the excited state.
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Affiliation(s)
- Amy A Cordones
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - C Das Pemmaraju
- SIMES, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Jae Hyuk Lee
- Pohang Accelerator Laboratory, Pohang 37673, Republic of Korea
| | - Ioannis Zegkinoglou
- Faculty of Physics and Astronomy, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Maria-Eleni Ragoussi
- Department of Organic Chemistry, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Franz J Himpsel
- Physics Department, University of Wisconsin Madison, Madison, Wisconsin 53706, United States
| | - Gema de la Torre
- Department of Organic Chemistry, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Robert W Schoenlein
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
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Stevens AL, Awuku S, Ghiggino KP, Hao Y, Novakovic S, Steer RP, White JM. Spectroscopic and Dynamic Properties of Electronically Excited Pendant Porphyrin Polymers with Backbones of Differing Flexibility. J Phys Chem A 2020; 124:10748-10757. [DOI: 10.1021/acs.jpca.0c09501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amy L. Stevens
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N5C9, Canada
| | - Stephen Awuku
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N5C9, Canada
| | - Kenneth P. Ghiggino
- School of Chemistry and ARC Centre of Excellence in Exciton Science, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Ying Hao
- School of Chemistry and ARC Centre of Excellence in Exciton Science, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Sacha Novakovic
- School of Chemistry and ARC Centre of Excellence in Exciton Science, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Ronald P. Steer
- Department of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan S7N5C9, Canada
| | - Jonathan M. White
- School of Chemistry and ARC Centre of Excellence in Exciton Science, University of Melbourne, Parkville, Victoria 3010, Australia
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Wang X, Shi Z, Chen H, Huang F. Nanoscale integration of porphyrin in GroEL protein cage: Photophysical and photochemical investigation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 240:118596. [PMID: 32599481 DOI: 10.1016/j.saa.2020.118596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 06/02/2020] [Accepted: 06/06/2020] [Indexed: 06/11/2023]
Abstract
In this paper, we introduce a new type of functional, supramolecular porphyrin conjugate created using the bacterial GroEL protein cage based on non-specific hydrophobic interaction. The synthesis, structure and property of the porphyrin conjugate were characterized by dynamic light scattering, UV-vis spectroscopy and fluorescence spectroscopy. We observed that the model zinc-tetraphenylporphyrin (Zn-TPP) with high hydrophobicity can be well-dispersed in aqueous solutions with the aid of GroEL open chamber, which is known to be a favorable nanocompartment for aggregation-prone molecules. The maximal encapsulation efficiency of Zn-TPP in GroEL was determined to be ~98%. It is further seen that the constructed double Zn-TPP-GroEL complex exhibited good photocatalytic activity in the model reactions of the production of singlet oxygen and the reduction of methyl viologen under illumination with visible light. Moreover, we found that GroEL can significantly improve the photostability of Zn-TPP molecules as a result of nanoscale assembly within its hydrophobic chamber. Hence enhanced water solubility and photostability of Zn-TPP, which are considered as the first two hurdles for the wide usage of porphyrins, were achieved simultaneously by the development of GroEL cage as a building block. Supramolecular nanostructures formed from porphyrins (or related molecules) and GroEL for photocatalysis would greatly simplify applications of such structures.
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Affiliation(s)
- Xiaoqiang Wang
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao, Shandong 266580, PR China.
| | - Zhuang Shi
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao, Shandong 266580, PR China
| | - Han Chen
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao, Shandong 266580, PR China
| | - Fang Huang
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao, Shandong 266580, PR China.
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Lopes JMS, Sampaio RN, Dinelli LR, Batista AA, Araujo PT, Neto NMB. On the excitation dependence of fluorescence spectra of meso-tetrapyridyl zinc (II) porphyrin and its relation with hydrogen bonding and outlying decoration. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 224:117371. [PMID: 31344576 DOI: 10.1016/j.saa.2019.117371] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 07/01/2019] [Accepted: 07/07/2019] [Indexed: 06/10/2023]
Abstract
Zinc porphyrins are potential candidates for boosting the advancement of various technological applications, including those exploring the molecule's radiative emissions. In this work, the excitation dependence of fluorescence spectra from 5,10,15,20-meso-tetrapyridyl zinc(II) porphyrin dissolved in a binary solvent mixture of CHCl3: MeOH, is reported. Important modifications in the profiles of the fluorescence bands are observed after exciting the molecules in a broad wavelength range from 350 to 565 nm. We attribute such modifications to the existence of two distinct relaxation pathways, related to two quasi-degenerated potential energy surfaces (PES) in the ZnTPyP's first excited state whose population rates changes for different excitation wavelengths. We also observed that by changing the CHCl3:MeOH proportion in the binary mixture, a quenching mechanism mediated by the MeOH hydrogen bondings and ZnTPyP takes place, which allows for tuning the excitation dependence of the aforementioned relaxations pathways. Moreover, our data confirm that the addition of outlying RuCl(dppb)(bipy) ruthenium complex linked to the pyridyl moieties of the ZnTPyP ring is also an excellent strategy to modify the excitation dependence of the fluorescence relaxation pathways.
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Affiliation(s)
- J M S Lopes
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil.
| | - R N Sampaio
- Department of Chemistry, The University of North Carolina at Chapel Hill, Murray Hall, Chapel Hill, NC, United States
| | - L R Dinelli
- College of Sciences of Pontal, Federal University of Uberlândia, Ituiutaba, MG, Brazil
| | - A A Batista
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, Brazil
| | - P T Araujo
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil; Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL, United States; Center of Materials for Information Technology (MINT Center) University of Alabama, Tuscaloosa, AL, United States.
| | - N M Barbosa Neto
- Institute of Natural Sciences, Graduate Program in Physics, Federal University of Pará, Belém, PA, Brazil.
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Stevens AL, Novakovic S, White JM, Wong WWH, Smith TA, Ghiggino KP, Paige MF, Steer RP. Exciton Dynamics of Photoexcited Pendant Porphyrin Polymers in Solution and in Thin Films. J Phys Chem A 2018; 122:9605-9614. [DOI: 10.1021/acs.jpca.8b09321] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Amy L. Stevens
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada S7N5C9
| | | | | | | | | | | | - Matthew F. Paige
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada S7N5C9
| | - Ronald P. Steer
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada S7N5C9
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Steer RP. Prospects for efficient solar energy upconversion using metalloporphyrins as dual absorber-upconverters. Dalton Trans 2018; 47:8517-8525. [PMID: 29260179 DOI: 10.1039/c7dt04343k] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The novel potential use of selected metalloporphyrins as dual absorber-upconverters in solar photovoltaics is discussed. Additional efficiencies are available if use can be made of the porphyrin's short-lived S2 state, which is formed directly by excitation in the strong Soret transition in the blue-violet and also by absorption in the Q bands followed by rapid intersystem crossing and upconversion by triplet-triplet annihilation. The main challenge in realizing a working photovoltaic based on such a protocol is that energy must be extracted from the S2 state of the porphyrin within its picosecond lifetime. The structure-property relationships that may be used to select metalloporphyrins with the longest possible intrinsic lifetimes are outlined. The prospects for energy extraction from S2via ultrafast electron transfer or ultrafast resonant electronic energy transfer within a solid structure designed to maximize efficiency are discussed. Both MOF and pendant porphyrin polymer structures offer reasonable possibilities.
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Affiliation(s)
- Ronald P Steer
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada S7N5C9.
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Latterini L, Massaro G, Penconi M, Gentili PL, Roscini C, Ortica F. Molecular-based upconversion in homo/heterogeneous liquids and in micro/nanostructured solid materials. Dalton Trans 2018; 47:8557-8565. [DOI: 10.1039/c8dt00020d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A step-by-step investigation to move TTA-UC from homogeneous solutions to nanostructured solid materials for new technological perspectives.
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Affiliation(s)
- L. Latterini
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Università di Perugia
- 06123 Perugia
- Italy
| | - G. Massaro
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Università di Perugia
- 06123 Perugia
- Italy
| | - M. Penconi
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Università di Perugia
- 06123 Perugia
- Italy
| | - P. L. Gentili
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Università di Perugia
- 06123 Perugia
- Italy
| | - C. Roscini
- Catalan Institute of Nanoscience and Nanotechnology (ICN2)
- CSIC and The Barcelona Institute of Science and Technology
- 08193 Barcelona
- Spain
| | - F. Ortica
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Università di Perugia
- 06123 Perugia
- Italy
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