Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Shunichi Fukuzumi | * |
dc.date.accessioned | 2016-08-28T12:08:33Z | - |
dc.date.available | 2016-08-28T12:08:33Z | - |
dc.date.issued | 2011 | * |
dc.identifier.issn | 1861-4728 | * |
dc.identifier.other | OAK-8194 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/222128 | - |
dc.description.abstract | Two new supramolecular architectures based on zinc phthalocyanine (Pc) and imidazolyl-substituted perylenediimide (PDI), ZnPc/DImPDI/ZnPc 1 and ZnPc/ImPDI 2, have been prepared. A strong electron-donor, ZnPc-8, which contained eight tert-octylphenoxy groups was synthesized to ensure high solubility, thereby reducing aggregation in solution and providing δ-donor features while avoiding regioisomeric mixtures. Also, PDI units were functionalized with tert-octylphenoxy groups at the bay positions, which provide solubility to avoid aggregation in solution, together with one and two imidazole moieties in the amide position, PDI-6 and PDI-4, respectively, to be able to strongly coordinate with the ZnPc complex. Supramolecular complexation studies by 1H NMR spectroscopy and ESI-MS demonstrate a high coordinative binding constant between imidazole-substituted PDI-4 or PDI-6 and ZnPc-8. The same results were confirmed by UV/Vis and fluorescence titration studies. UV/Vis titration studies revealed the formation of a 1:1 complex ZnPc/ImPDI 2 for the systems ZnPc-8 and PDI-6 and a 2:1 complex ZnPc/DImPDI/ZnPc 1 for the interaction of ZnPc-8 and PDI-4. The binding constant in both cases was determined to be on the order of 10 5 M -1. Femtosecond laser flash photolysis measurements provided a direct proof of the charge-separated state within both supramolecular assemblies by observing the transient absorption band at 820 nm due to the zinc phthalocyanine radical cation. The lifetimes of charge-separated states are (9.8±3) ns for triad 1 and (3±1) ns for dyad 2. As far as we know, this is the first time that a radical ion pair has been detected in a supramolecular assembled ZnPc-PDI system and has obtained the longest lifetime of a charge-separated state published for ZnPc-PDI assemblies. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. | * |
dc.language | English | * |
dc.title | Supramolecular zinc phthalocyanine-imidazolyl perylenediimide dyad and triad: Synthesis, complexation, and photophysical studies | * |
dc.type | Article | * |
dc.relation.issue | 11 | * |
dc.relation.volume | 6 | * |
dc.relation.index | SCI | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 3110 | * |
dc.relation.lastpage | 3121 | * |
dc.relation.journaltitle | Chemistry - An Asian Journal | * |
dc.identifier.doi | 10.1002/asia.201100273 | * |
dc.identifier.wosid | WOS:000297420200034 | * |
dc.identifier.scopusid | 2-s2.0-80155143200 | * |
dc.author.google | Cespedes-Guirao F.J. | * |
dc.author.google | Ohkubo K. | * |
dc.author.google | Fukuzumi S. | * |
dc.author.google | Fernandez-Lazaro F. | * |
dc.author.google | Sastre-Santos A. | * |
dc.contributor.scopusid | Shunichi Fukuzumi(35430038100;58409757400) | * |
dc.date.modifydate | 20240401081001 | * |