An amphiphilic zinc porphyrin-fullerene dyad appended with triethyleneglycol chains in aqueous media forms uniformly-sized multilamellar vesicles with a mean diameter of 100 nm that are thermally stable and robust against membrane lysis with surfactants.
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Electronic, optical and charge transport properties of Zn-porphyrin-C MOFs: a combined periodic and cluster modeling.
Dalton Trans
October 2024
Laboratory of Theoretical Chemistry, Faculty of Chemistry and Biology, University of Santiago de Chile (USACH), Santiago, Chile.
Density functional theory (DFT) calculations were performed on the 5,15 meso-positions of nine porphyrin-containing MOFs; Zn(TCPB)-(NMe-ZnP); (HTCPB = 1,2,4,5-tetrakis(4-carboxyphenyl)benzene), (NMe-ZnP = [5,15-bis[(4-pyridyl)-ethynyl]-10,20-bis-(dimethylamine) porphinato]zinc(II)) functionalized with nitrogen-, oxygen-, and sulfur-containing groups to study their effects on the electronic, optical and transport properties of the materials. The properties of these materials have also been investigated by encapsulating fullerene (C) in their pores (C@MOFs). The results indicate that the guest C in the MOF generates high photoconductivity through efficient porphyrin/fullerene donor-acceptor (D-A) interactions, which are facilitated by oxygen and sulfur functionalities.
View Article and Find Full Text PDFExcited Charge Separation in a π-Interacting Phenothiazine-Zinc Porphyrin-Fullerene Donor-Acceptor Conjugate.
J Phys Chem A
May 2024
Department of Polymers and Functional Materials, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad 500007, India.
We have designed, synthesized, and characterized a donor-acceptor triad, , that consists of a π-interacting phenothiazine-linked porphyrin as a donor and sensitizer and fullerene as an acceptor to seek charge separation upon photoexcitation. The optical absorption spectrum revealed red-shifted Soret and Q-bands of porphyrin due to charge transfer-type interactions involving the two ethynyl bridges carrying electron-rich and electron-poor substituents. The redox properties suggested that the phenothiazine-porphyrin part of the molecule is easier to oxidize and the fullerene part is easier to reduce.
View Article and Find Full Text PDFSupramolecular Fullerene Tetramers Concocted with Porphyrin Boxes Enable Efficient Charge Separation and Delocalization.
J Am Chem Soc
July 2020
Center for Self-assembly and Complexity, Institute for Basic Science, Pohang 37673, Republic of Korea.
Herein, we report a novel porphyrin/fullerene supramolecular cocrystal using a shape-persistent zinc-metalated porphyrin box (Zn-PB) and C/C. An unprecedented arrangement of a tightly packed square-planar core of four C or C surrounded by six cube-shaped Zn-PBs was observed. This unique packing promotes strong charge transfer (CT) interactions between the two components in the ground state and formation of charge-separated states with very long lifetimes in the excited state and enables unusually high photoconductivity.
View Article and Find Full Text PDFPorphyrin Trio-Pendant fullerene guest as an In situ universal probe of high ECL efficiency for sensitive miRNA detection.
Biosens Bioelectron
February 2020
Key Laboratory of New Membrane Materials, Ministry of Industry and Information Technology, School of Environmental and Biological and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China. Electronic address:
In this work, pyrrolidyl C derivative was recruited as an unadulterated and congruent nano-hub to converge three zinc porphyrins on its monopole. Such peculiar assembly was convinced via micro-imaging and spectrophotometry. Making the best of fullerenyl proficiency in catalytic singlet O generation and excited-state preservation, a multiplied electrochemiluminescence (ECL) emission bursted out from the porphyrin trinity in a synergistic manner.
View Article and Find Full Text PDFEffect of the triazole ring in zinc porphyrin-fullerene dyads on the charge transfer processes in NiO-based devices.
Phys Chem Chem Phys
October 2018
Laboratory of Bioinorganic Chemistry, Department of Chemistry, University of Crete, Voutes Campus, 70013 Heraklion, Crete, Greece.
Herein, the synthesis of three covalently linked donor-acceptor zinc porphyrin-fullerene (ZnP-C) dyads (CtrZnPCOOH, CtrZnPtrCOOH and CZnPCOOH) is described, and their application as sensitizers in NiO-based dye-sensitized solar cells (DSCs) is discussed. To the best of our knowledge, this is the first example where covalently linked ZnP-C dyads have been used as chromophores in NiO-based DSCs. In an effort to examine whether the distance of the chromophore from the electron acceptor entity and/or the NiO surface affects the performance of the cells, a triazole ring was introduced as a spacer between ZnP and the two peripheral units C and -COOH.
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