Silver-catalyzed carbonphosphonation of α,α-diaryl allylic alcohols is achieved. A series of γ-ketophosphonates with different substituents were readily obtained. The mechanistic study indicated that the reaction was initiated by the addition of P-radicals, which sequentially undergo 1,2-migration of an aryl group to form C(Ar)-C(sp(3)) bonds.

A number of studies address the spatial planning, architectural design, and management public open spaces (POSs) to curb overuse create high-quality spaces. Little attention has been paid problem underutilization POSs. Therefore, this paper undertakes a comprehensive analysis literature on factors that influence vitality POSs, proposing Bronfenbrenner’s social–ecological model (SEM) as conceptu...

Two kinds of fluorinated polymers were synthesized: an acrylate polymer having a fluorinated triethylene glycol as a pendant group (2a) and a fluoroalkyl acrylate polymer (2b). The contact angle of these fluorinated polymers against water, non-fluorinated alcohols and fluorinated alcohols were evaluated. As compared with the fluoroalkyl polymer (2b), fluoroethylene glycol polymer (2a) showed sm...

The name management capabilities currently provided by most existing persistent object systems (POSs) are rather limited. In particular, existing POSs tend to lack powerful and general mechanisms for forming, manipulating, controlling and reasoning about contexts. As a result, these POSs offer only weak or awkward support for large-scale data storage, multi-user computing, code reuse, interoper...

A novel luminescent polyhedral oligomeric silsesquioxane (POSS) containing in the structure a fluorescein derivative molecule and a carboxylic functionality, suitable to anchor different organic compounds (dyes, markers, drugs, contrast agents, …), was successfully synthesized and characterized in this manuscript by a multidisciplinary approach. An emission enhancement of the dye of ca. four ti...

Microporous organosilicas assembled from polysilsesquioxane (POSS) building blocks are promising materials that yet to be explored in-depth. Here, we investigate the processing and molecular structure of bispropylurea bridged POSS (POSS-urea), synthesised through acidic condensation 1,3-bis(3-(triethoxysilyl)propyl)urea (BTPU). Experimentally, show POSS-urea has excellent functionality for reco...

A diverse and entirely new class of monomer and polymer technology based on polyhedral oligomeric silsesquioxane (POSS) reagents has been developed. POSS reagents are unique in that they are physically large (approx. 15 Å diameter and 1000 amu) and are composed of a robust silicon–oxygen framework that can be easily functionalized with a variety of organic substituents. Appropriate functionaliz...

The first structurally characterized isobutyl-containing aluminoxane compound is presented. The Al10O6iBu16(mu-H)2 (I) cluster is produced from neat octakis-isobutyltetraluminoxane (Al4O2iBu8) at 80 degrees C in 6-8 h followed by slow crystallization. The crystal is triclinic (space group P1) with the molecule lying on an inversion center. This aluminoxane contains both nearly linear, 154(2) de...

A new approach is presented for detecting whether a particular computation of an asyn-chronous distributed system satisses Poss (read \possibly "), meaning the system could have passed through a global state satisfying predicate , or Def (read \deenitely "), meaning the system deenitely passed through a global state satisfying. Detection can be done easily by straightforward state-space search;...