1D Coordination π‐d Conjugated Polymers with Distinct Structures Defined by the Choice of the Transition Metal: Towards a New Class of Antiaromatic Macrocycles

Recently, pi–d conjugated coordination polymers have received a lot of attention owing to their unique material properties, although synthesis of long and defect-free polymers remains challenging. Herein, we introduce a novel on-surface synthesis of coordination polymers with quinoidal ligands under ultra-high vacuum conditions, which enables formation of flexible coordination polymers with lengths up to hundreds of nanometers. Moreover, this procedure allows the incorporation of different transition-metal atoms with four- (M = Cr, Fe, Ni, Co) or two-fold (M = Cu) coordination. Remarkably, the two-fold coordination mode revealed the formation of wires constituted by (electronically) independent 12-membered antiaromatic macrocycles linked together through two C-C single bonds.

Reference:
V. M. Santhini, C. Wäckerlin, A. Cahlik, M. Ondráček, S. Pascal, A. Matěj, O. Stetsovych, P. Mutombo, P. Lazar, O. Siri and P. Jelinek
Angew. Chem. Int. Ed. 2021, 60, 439-445.
DOI: 10.1002/anie.202011462

Archive HAL: https://hal.archives-ouvertes.fr/hal-02932130v1