22921-72-8Relevant articles and documents
Self-assembly studies of allosteric photosynthetic antenna model systems
Thomassen, Paul J.,Foekema, Jantien,I Lluch, Ribera Jordana,Thordarson, Pall,Elemans, Johannes A. A. W.,Nolte, Roeland J. M.,Rowan, Alan E.
, p. 148 - 155 (2006)
In this paper allosteric interactions are employed to enhance electron transfer in a pseudorotaxane system. Binding of an axial ligand (tbpy) to an electron donating mono-cavity appended zinc porphyrin (ZnP) increases the complexation strength to an elect
2-AMINO-1,3,4-THIADIAZINE AND 2-AMINO-1,3,4-OXADIAZINE BASED ANTIFUNGAL AGENTS
-
Page/Page column 51; 52, (2017/02/09)
The invention provides a compound which is a diazine of formula (I) or a tautomer thereof, or a pharmaceutically acceptable salt thereof, for use as an antifungal agent: (I) wherein X, N', C', A and E are as defined herein. The invention also provides a compound of Formula (I) as defined herein.
ω-Phenoxyalkyl substituted bis(indenyl)zirconium dichloride complexes as catalysts for homogeneous ethylene polymerization
Ahmad, Khalil,Alt, Helmut G.
, p. 63 - 71 (2015/06/02)
Nine bis(indenyl)zirconium dichloride complexes of the type [C9H6-(CH2)n-O-Ar]2ZrCl2 (n = 3-5; Ar = Ph, t-Bu-Ph) were synthesized, characterized, activated with methylalumoxane (MAO) and tested for ethylene polymerization. Structure-property-relationship studies showed that the activities of the catalysts depend on the length of the bridging chain between the indenyl and the phenoxy group as well as on the bulk at the phenoxy substituent. A t-Bu substituent at the ortho position of the phenoxy group (5a/MAO) gives a much higher catalyst activity (27,500 kg PE/mol cat h) than the isomer 8a/MAO with a t-Bu substituent at the para position of the phenoxy group (16,700 kg PE/mol cat h). Obviously substituents in the ortho position of the phenyl ring generate a bulkier catalyst cation and this can keep the MAO anion at a further distance to allow easier ethylene coordination and chain growth in the polymerization steps. The mono substituted bis(indenyl) complex (C9H7)[C9H6-(CH2)4-O-4-t-Bu]ZrCl2 shows lower activity (11,700 kg PE/mol cat h) than 8a indicating that the electronic effect is dominating in this type of catalysts.