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- Title
A Triply Linked Copper(III) Dicarbacorrole Dimer.
- Authors
Jiao, Ruijuan; Liu, Ningchao; Zong, Zhaohui; Ke, Xian‐Sheng
- Abstract
A triply linked dicarbacorrole dimer (7) was synthesized from a new meso‐meso singly linked dicarbacorrole dimer precursor (6) via an oxidative fusion reaction by 2,3‐dichloro‐5,6‐dicyano‐p‐benzoquinone (DDQ) in the presence of trifluoromethanesulfonic acid (TfOH). Single crystal X‐ray structure of 7 adopts a flat conformation with a length as ca. 15.946 Å and a width as 6.903 Å, which can be regarded as a short carbaporphyrinoid tape. Two coordinated Cu ions keeps the +3 oxidation state in 7, as confirmed by NMR spectroscopy, single crystal X‐ray diffraction and X‐ray photoelectron spectroscopy (XPS). This is in sharp contrast to the Osuka's triply linked tetrapyrrolic corrole dimers, where the inner 3NH form is not stable and thus can only act as a divalent ligand. Due to the non‐aromatic nature of dicarbacorrole macrocycle, the largely decreased HOMO‐LUMO gap and red‐shifted absorption of 7 are best ascribed to the strong electronic interaction between two dipyrromethene‐type chromophores. To our knowledge, this is the first fully fused carbaporphyrinoid dimer with β‐β, meso‐meso, β‐β triply linkages prepared to date.
- Subjects
X-ray photoelectron spectroscopy; METHYL triflate; NUCLEAR fusion; SINGLE crystals; X-ray diffraction
- Publication
Chemistry - A European Journal, 2024, Vol 30, Issue 35, p1
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202401240