Recently, Penta-coordinated Al (Al^V) have attracted large attention and is promising for tailoring catalysts with the capability to form new BAS in specific mixed oxide. In this study, amorphous alumina-boria materials with enriched surface Al^V were prepared as platforms for the formation of potential new BAS. With the aid of solid-state NMR, interacting species of Al^V with three-coordinated boron have been identified in the highly distorted local structure with BAS forming potential (Al^V-OH···B^III). The catalytic activity of the Al^V-BAS has been tested by the phenylglyoxal conversion, where the functionality of Al^V-BAS has been further verified by the in situ ¹H NMR. Herein, the ssNMR observation demonstrates the first experimental visualization of a new type Al^V-BAS in non-silica alumina materials present with predominance. The Al^V-BAS is promising to serve as one new state-of-the-art strategy to improve acid catalytic performance in varied mixed oxides.

最近，五配位铝（Al ^V）引起了广泛关注，并有望用于定制能够在特定混合氧化物中形成新BAS的催化剂。^{在这项研究中，制备了具有富集表面 Al V}的无定形氧化铝-氧化硼材料作为形成潜在新 BAS 的平台。借助固态核磁共振，在具有BAS形成势(Al ^V -OH···B ^III )的高度扭曲的局部结构中鉴定了Al ^V与三配位硼的相互作用物种。^{Al V} -BAS的催化活性已通过苯乙二醛转化进行了测试，其中 Al ^{V的官能度}-BAS已通过原位¹ H NMR进一步验证。在此，ssNMR 观察证明了新型 Al ^V -BAS 在占优势的非二氧化硅氧化铝材料中的首次实验可视化。Al ^V -BAS 有望作为一种新的最先进的策略来提高各种混合氧化物中的酸催化性能。