A zinc acetate borate, [ZnAc]·[ZnBO] (), was synthesized under mild conditions; the B@ZnO layer of contains a 6-membered ring embedded with a rare BO unit. The layers are pillared by acetate ions to form a 3D framework. The pillared structure of supplies enough space as a nanoreactor, and the related application of CO-to-CO reduction has been confirmed.
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