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71.
Oblatum 6-XII-1989 &; 13-IX-1990 相似文献
72.
Yang-Hua Tang Ting-Ting Liang Ting-Ting Fan Lawrence Jordan Keen Xiao-Dan Zhang Lin Xu 《Natural product research》2020,34(15):2151-2156
AbstractNeo-debromoaplysiatoxin C (1), a new member of the aplysiatoxin family, was isolated from the marine cyanobacterium Lyngbya sp. The structure of 1 was elucidated based on spectroscopic data, and its stereochemistry was determined from NOESY spectrum and biosynthetic considerations. This new compound presents an intriguing 10-membered lactone ring skeleton derived from debromoaplysiatoxin by structural rearrangement, which is the first example in the aplysiatoxin family. Its biological properties were evaluated for cytotoxicity, PKCδ activation and inhibitory effects on potassium channel. 相似文献
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74.
Bennett TD Simoncic P Moggach SA Gozzo F Macchi P Keen DA Tan JC Cheetham AK 《Chemical communications (Cambridge, England)》2011,47(28):7983-7985
We report the reversible pressure-induced amorphization of a zeolitic imidazolate framework (ZIF-4, [Zn(Im)(2)]). This occurs irrespective of pore occupancy and takes place via a novel high pressure phase (ZIF-4-I) when solvent molecules are present in the pores. A significant reduction in bulk modulus upon framework evacuation is also observed for both ZIF-4 and ZIF-4-I. 相似文献
75.
Ashleigh M. Chester Dr. Celia Castillo-Blas Prof. Lothar Wondraczek Prof. David A. Keen Dr. Thomas D. Bennett 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(38):e202200345
Here, we propose the combination of glassy or crystalline metal-organic frameworks (MOFs) with inorganic glasses to create novel hybrid composites and blends.The motivation behind this new composite approach is to improve the processability issues and mechanical performance of MOFs, whilst maintaining their ubiquitous properties. Herein, the precepts of successful composite formation and pairing of MOF and glass MOFs with inorganic glasses are presented. Focus is also given to the synthetic routes to such materials and the challenges anticipated in both their production and characterisation. Depending on their chemical nature, materials are classified as crystalline MOF-glass composites and blends. Additionally, the potential properties and applications of these two classes of materials are considered, the key aim being the retention of beneficial properties of both components, whilst circumventing their respective drawbacks. 相似文献
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77.
Raman mapping by point illumination of polymer surfaces is discussed with examples taken from the plasma treatment of polypropylene (PP) and subsequent grafting of polystyrene (PS). Maps can be constructed for surface properties such as crystallinity, blend components and distribution of grafted PS. The Raman sampling volume was estimated for confocal operation using a 50x objective lens. 相似文献