Syntheses, structure solutions, and catalytic performance of two novel layered silicates

Two novel layered silicates, PKU-13 and PKU-13a, were hydrothermally synthesized by using trimethyl-propylammonium hydroxide as the structure directing agent (SDA). Their structures were solved by using powder X-ray diffraction data in combination with electron diffraction technique and NMR spectroscopy. These two silicates are built from the same r52 layer in different stacking modes: the adjacent r52 layers in PKU-13a have a 0.5b + 0.68c shift compared with those in PKU-13. The difference is due to the SDA cations located between the layers. The SDA cations exist as a monolayer in the structure of PKU-13, and link the adjacent layers by Coulomb actions in combination with strong hydrogen bonds. In PKU-13a, the SDA cations present in the bi-layer expend the distance between layers and destroy the inter-layer hydrogen bonds. PKU-13a can transform to PKU-13 after treatment with acetic acid solution. The co-existence of intra-layer hydrogen bonds in PKU-13 interfere in its condensation to an ordered crystalline microporous framework. Both PKU-13 and PKU-13a exhibit good catalytic activities as base catalysts in the Knoevenagel condensation reaction.

Su, JieStockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)jsu (författare)
Chen, Yanping (författare)
Li, Zhaofei (författare)
Li, Kuo (författare)
Zhang, Hao (författare)
Zou, XiaodongStockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)xzou (författare)
Liao, Fuhui (författare)
Wang, Yingxia (författare)
Lin, Jianhua (författare)
Stockholms universitetInstitutionen för material- och miljökemi (MMK) (creator_code:org_t)

Ingår i:Dalton Transactions: Royal Society of Chemistry (RSC)44:35, s. 15567-155751477-92261477-9234

Av författaren/redakt...: Liang, Jie; Su, Jie; Chen, Yanping; Li, Zhaofei; Li, Kuo; Zhang, Hao; visa fler...; Zou, Xiaodong; Liao, Fuhui; Wang, Yingxia; Lin, Jianhua; visa färre...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.