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Construction of defected MOF-74 with preserved crystallinity for efficient catalytic cyanosilylation of benzaldehyde

Numerous open metal sites and well-developed micropores are the two most significant characteristics that should be imparted to design metal–organic frameworks (MOFs) as effective catalysts. However, the construction of the best MOF catalyst with both these characteristics is challenging because the...

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Autores principales: Shim, Chul Hwan, Oh, Sojin, Lee, Sujeong, Lee, Gihyun, Oh, Moonhyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10009656/
https://www.ncbi.nlm.nih.gov/pubmed/36922955
http://dx.doi.org/10.1039/d3ra01222k
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author Shim, Chul Hwan
Oh, Sojin
Lee, Sujeong
Lee, Gihyun
Oh, Moonhyun
author_facet Shim, Chul Hwan
Oh, Sojin
Lee, Sujeong
Lee, Gihyun
Oh, Moonhyun
author_sort Shim, Chul Hwan
collection PubMed
description Numerous open metal sites and well-developed micropores are the two most significant characteristics that should be imparted to design metal–organic frameworks (MOFs) as effective catalysts. However, the construction of the best MOF catalyst with both these characteristics is challenging because the creation of numerous open metal sites generally triggers some structural collapse of the MOF. Herein, we report the construction of well-structured but defected MOFs through the growth of defected MOFs, where some of the original organic linkers were replaced with analog organic linkers, on the surface of a crystalline MOF template (MOF-on-MOF growth). Additional open metal sites within the MOF-74 structure were generated by replacing some of the 2,5-dihydroxy-1,4-bezenedicarboxylic acid presenting in MOF-74 with 1,4-benzenedicarboxylic acid due to the missing hydroxyl groups. And the resulting additional open metal sites within the MOF-74 structure resulted in enhanced catalytic activity for the cyanosilylation of aldehydes. However, the collapse of some of the well-developed MOF-74 structure was also followed by structural defects. Whereas, the growth of defected MOF-74 (D-MOF-74) on the well-crystallized MOF-74 template led to the production of relatively well-crystallized D-MOF-74. Core–shell type MOF-74@D-MOF-74 having abundant open metal sites with a preserved crystallinity exhibited the efficient catalytic cyanosilylation of several aldehydes. Additionally, MOF-74@D-MOF-74 displayed excellent recyclability during the consecutive catalytic cycles.
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spelling pubmed-100096562023-03-14 Construction of defected MOF-74 with preserved crystallinity for efficient catalytic cyanosilylation of benzaldehyde Shim, Chul Hwan Oh, Sojin Lee, Sujeong Lee, Gihyun Oh, Moonhyun RSC Adv Chemistry Numerous open metal sites and well-developed micropores are the two most significant characteristics that should be imparted to design metal–organic frameworks (MOFs) as effective catalysts. However, the construction of the best MOF catalyst with both these characteristics is challenging because the creation of numerous open metal sites generally triggers some structural collapse of the MOF. Herein, we report the construction of well-structured but defected MOFs through the growth of defected MOFs, where some of the original organic linkers were replaced with analog organic linkers, on the surface of a crystalline MOF template (MOF-on-MOF growth). Additional open metal sites within the MOF-74 structure were generated by replacing some of the 2,5-dihydroxy-1,4-bezenedicarboxylic acid presenting in MOF-74 with 1,4-benzenedicarboxylic acid due to the missing hydroxyl groups. And the resulting additional open metal sites within the MOF-74 structure resulted in enhanced catalytic activity for the cyanosilylation of aldehydes. However, the collapse of some of the well-developed MOF-74 structure was also followed by structural defects. Whereas, the growth of defected MOF-74 (D-MOF-74) on the well-crystallized MOF-74 template led to the production of relatively well-crystallized D-MOF-74. Core–shell type MOF-74@D-MOF-74 having abundant open metal sites with a preserved crystallinity exhibited the efficient catalytic cyanosilylation of several aldehydes. Additionally, MOF-74@D-MOF-74 displayed excellent recyclability during the consecutive catalytic cycles. The Royal Society of Chemistry 2023-03-13 /pmc/articles/PMC10009656/ /pubmed/36922955 http://dx.doi.org/10.1039/d3ra01222k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Shim, Chul Hwan
Oh, Sojin
Lee, Sujeong
Lee, Gihyun
Oh, Moonhyun
Construction of defected MOF-74 with preserved crystallinity for efficient catalytic cyanosilylation of benzaldehyde
title Construction of defected MOF-74 with preserved crystallinity for efficient catalytic cyanosilylation of benzaldehyde
title_full Construction of defected MOF-74 with preserved crystallinity for efficient catalytic cyanosilylation of benzaldehyde
title_fullStr Construction of defected MOF-74 with preserved crystallinity for efficient catalytic cyanosilylation of benzaldehyde
title_full_unstemmed Construction of defected MOF-74 with preserved crystallinity for efficient catalytic cyanosilylation of benzaldehyde
title_short Construction of defected MOF-74 with preserved crystallinity for efficient catalytic cyanosilylation of benzaldehyde
title_sort construction of defected mof-74 with preserved crystallinity for efficient catalytic cyanosilylation of benzaldehyde
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10009656/
https://www.ncbi.nlm.nih.gov/pubmed/36922955
http://dx.doi.org/10.1039/d3ra01222k
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