4.5 Article

Synthesis, Structures and Optical Limiting of Catecholato-Based Aluminum Oxo Clusters

期刊

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202200376

关键词

Aluminum; Catechol; Chelating ligand; Clusters; Optical limiting

资金

  1. National Natural Science Foundation of China [92061104, 21935010, 21973096]
  2. Natural Science Foundation of Fujian Province [2021J06035]
  3. Youth Innovation Promotion Association CAS [2017345, Y2018081]

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The currently largest catecholato-based aluminum oxo clusters were synthesized and high nuclearity AlOCs were successfully achieved by adjusting the amount of auxiliary ligands. New compounds were obtained using imidazole ligands. The compounds exhibit manifest reverse saturation absorption response.
Present herein is the currently largest catecholato-based aluminum oxo clusters. By adjusting the amount of auxiliary 3, 5-dimethylpyrazole ligands, the synthesis of aluminum oxo clusters (AlOCs) (AlOC-86) to high nuclearity AlOCs (AlOC-88) were successfully achieved. Such synthetic strategy is applicable to imidazole ligands and new compounds (AlOC-87 and AlOC-89) were obtained. Single crystal analysis shows that AlOC-86 and AlOC-87 are hexanuclear clusters made up of two edge-sharing tetrahedral clusters. The nuclearity of compounds AlOC-88 and AlOC-89 is doubled and they are S-shape dodecanuclear AlOCs. The aggregation of such clusters is attributed to the labile sites on the two ends of the hexanuclear clusters. In addition, open aperture (OA) Z-scan measurements results indicate that these compounds exhibit manifest reverse saturation absorption (RSA) response.

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