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Synthesis and coordination of a dipyrrin appended N-confused porphyrin
East China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China.;East China Univ Sci & Technol, Inst Fine Chem, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China..
Linköping Univ, Dept Sci & Technol, Lab Organ Elect, SE-60174 Norrköping, Sweden..ORCID iD: 0000-0002-0716-3385
East China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China.;East China Univ Sci & Technol, Inst Fine Chem, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China..
East China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China.;East China Univ Sci & Technol, Inst Fine Chem, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China..ORCID iD: 0000-0001-5602-6566
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2023 (English)In: Journal of Porphyrins and Phthalocyanines, ISSN 1088-4246, E-ISSN 1099-1409, Vol. 27, no 1, p. 285-292Article in journal (Refereed) Published
Abstract [en]

A hexapyrrane P6 with a terminal N-confused pyrrole was synthesized by acid-catalyzed [3+3] condensation followed by oxidation with DDQ, which did not afford the expected N-confused hexaphyrin. In stead, a rearranged product, i.e., α-dipyrrin appended N-confused porphyrin 1 was obtained in a yield of 46%. Chelation of 1 with Pt(II) afforded the peripheral complex 1-Pt, which was further coordinated with Rh(I) in the cavity to afford the corresponding bimetallic complex 1-Pt-Rh. Both 1-Pt and 1-Pt-Rh exhibit split Soret-like bands and noticeable Q-like bands tailing to the NIR region up to ca. 1200 nm. Single crystal X-ray diffraction analyses of 1 and 1-Pt revealed that the peripheral coordination of Pt(II) slightly modifies the interplanar angle between the porphyrin macrocycle and the dipyrrin unit, which may modulate the absorption spectra. The results of this work compose an interesting example of synthesizing porphyrinoids appended with conjugated peripheral chains by the oxidative ring closure reaction of an oligopyrrane containing a terminal N-confused pyrrole, and such compounds may be used for both inner and peripheral coordination to afford complexes with tunable NIR absorption.

Place, publisher, year, edition, pages
World Scientific, 2023. Vol. 27, no 1, p. 285-292
Keywords [en]
N-confused porphyrin, metal coordination, crystal structures, theoretical calculations
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Identifiers
URN: urn:nbn:se:uu:diva-520024DOI: 10.1142/S1088424622500985ISI: 000906243600001OAI: oai:DiVA.org:uu-520024DiVA, id: diva2:1830989
Funder
Swedish Research Council, 2018-05973Swedish Research Council, 2020-04600Swedish National Infrastructure for Computing (SNIC)Available from: 2024-01-24 Created: 2024-01-24 Last updated: 2024-01-24Bibliographically approved

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Ågren, Hans

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