Smooth points in some spaces of bounded operators

We determine the smooth points of certain spaces of bounded operatorsL(X,Y), including the cases whereX andY arel ^p -orc ₀-direct sums of finite dimensional Banach spaces or subspaces of the latter enjoying the metric compact approximation property. We also remark that the operators not attaining their norm are nowhere dense inL(X,Y) wheneverK(X,Y) is anM-ideal inL(X,Y).     

Chemie polyfunktioneller moleküle: LXXVI. Metallcarbonyl-, metallnitrosylcarbonyl-und metallnitrosyl-komplexe des bis(diphenylphosphino)amins

The compound Ph₂PN(H)PPh₂ (I) reacts under special conditions with M(CO)₆ (M  Cr, Mo), Fe(NO)₂(CO)₂ and Co(NO)(CO)₃ to give the new complexes cis-M(CO)₂[Ph₂PN(H)PPh₂]₂ (III, IV), [Fe(NO)₂(CO)Ph₂P]₂NH (V), [Fe(NO)₂Ph₂-PN(H)PPh₂]₂ (VI) and Co(NO)(CO)₂Ph₂PN(H)PPh₂ (VII). Compound VI can also be prepared reacting V with I. For III and IV proton NMR spectra indicate some interaction between o-protons of the phenyl rings and cis-M(CO)₂ groups. VI exists an eight-membered ring complex without a metal-metal bond. On the basis of spectroscopic data VII seems to exist in two conformers.     

废生物质衍生碳修饰多孔石墨氮化碳异质结用于海水中氧四环素的高效光降解

以香蕉皮(BP)和尿素为原料,采用单步热处理工艺合成了一种无金属光催化剂。生物质衍生碳(BC)与多孔石墨相氮化碳(pg-C₃N₄)间的紧密界面效应显著增加了复合材料(pg-C₃N₄/BC)的比表面积,扩大了光响应范围,并提升了光诱导电子的迁移速率及光催化剂的稳定性。在可见光照射70 min后,pg-C₃N₄/BC降解人工海水中氧四环素(OTC)的反应速率常数为pg-C₃N₄的9.4 倍。另外,由于光生电荷分离和转移的促进作用,pg-C₃N₄/BC 在连续流反应过程中对 OTC 也具有更优异的光催化降解效果。此外,提出了一种潜在的光催化机制,以解释pg-C₃N₄/BC复合材料性能增强的原因。     

A new lignan from Gynostemma pentaphyllum

A new lignan ligballinone 1 with the know ligballinol 2 were isolated from plant Gynostemma pentaphyllum.Their structures were determined through spectroscopic methods including ESI-MS,1D and 2D NMR (1H,13C,DEPT,1H-1H COSY,HMQC,RMBC) and X-ray diffraction experiment for 2.     

Chemie polyfunktioneller Moleküle. 97. Beiträge zur Komplexchemie des Lithium-bis(diphenylphosphino)amids,des Bis(diphenylphosphino)amins und des Tris(diphenylphosphino)amins

Chemistry of Polyfunctional Molecules. 97. Contributions to the Coordination Chemistry of Lithium-bis(diphenylphosphino)amide, Bis(diphenylphosphino)amine, and Tris(diphenyl-phosphino)amine (Ph₂P)₂NLi ( 1 ) forms with AuCl(PPh₃) the already known complex [Au(Ph₂P)₂N]₂ ( 2 ), which now has been proved by mass spectroscopy to possess the postulated dimeric structure. 2 gives with HCl, HClO₄, and HBF₄ the new compounds [ClAu(Ph₂P)₂NH]₂ ( 3a ) and [Au(Ph₂P)₂NH…?X]₂ [X = ClO₄ ( 3b ), BF₄ ( 3c )]. In analogy the neutral complex Fe(C₅H₅)(CO)(Ph₂P)₂N ( 5 ) os obtained from FeCl(C₅H₅)(CO)₂ and 1. 5 reacts with HCl to [Fe(C₅H₅)(CO)(Ph₂P)₂NH…?Cl] ( 6a ). The last one can also be prepared by direct reaction of FeCl(C₅H₅)(CO)₂ with (Ph₂P)₂NH ( 4 ). In the same way FeBr(C₅H₅)(CO)₂ reacts with 4 yielding [Fe(C₅H₅)(CO)(Ph₂P)₂NH…?Br] ( 6b ), which leads under metathesis with NH₄PF₆ to [Fe(C₅H₅)(CO)(Ph₂P)₂NH]PF₆ ( 6c ). With PdCl₂(NCPh)₂ the ligand 1 forms Pd[(Ph₂P)₂N]₂ ( 7 ), which also can be synthesized in another way, but is now for the first time characterized in a spectroscopically detailed manner. Cr(CO)₄(Ph₂P)₂NPPh₂ reacts with AuCl(CO) to Cr(CO)₄(Ph₂P)₂NPPh₂AuCl ( 8 ). This compound gives with Cr(CO)₄(Ph₂P)₂NLi the trimetallic complex (OC)₄Cr(Ph₂P)₂NPPh₂AuN(PPh₂)₂Cr(CO)₄ ( 9 ). (Ph₂P)₃N ( 10 ) yields with AuCl(CO) in the molar ratio of 1:3 the compound [ClAuPh₂P]₃N ( 11 ).     

Synthetic mammalian gene networks as a blueprint for the design of interactive biohybrid materials

Synthetic biology aims at the rational design and construction of devices, systems and organisms with desired functionality based on modular well-characterized biological building blocks. Based on first proof-of-concept studies in bacteria a decade ago, synthetic biology strategies have rapidly entered mammalian cell technology providing novel therapeutic solutions. Here we review how biological building blocks can be rewired to interactive regulatory genetic networks in mammalian cells and how these networks can be transformed into open- and closed-loop control configurations for autonomously managing disease phenotypes. In the second part of this tutorial review we describe how the regulatory biological sensors and switches can be transferred from mammalian cell synthetic biology to materials sciences in order to develop interactive biohybrid materials with similar (therapeutic) functionality as their synthetic biological archetypes. We develop a perspective of how the convergence of synthetic biology with materials sciences might contribute to the development of truly interactive and adaptive materials for autonomous operation in a complex environment.     

Ordered Involutive Operator Spaces

This is a companion to recent papers of the authors; here we construct the ‘noncommutative Shilov boundary’ of a (possibly nonunital) selfadjoint ordered space of Hilbert space operators. The morphisms in the universal property of the boundary preserve order. As an application, we consider ‘maximal’ and ‘minimal’ unitizations of such ordered operator spaces.     

Multipliers on matrix ordered operator spaces and some K-groups

Matrix ordered operator spaces are ‘non-commutative Banach spaces equipped with a non-commutative order’. Examples include C*-algebras as well as their duals. In this article, we define and intrinsically characterize the multiplier algebra for this class of spaces and briefly tackle the problem of extending K-theory to this context.