Synthesis, Chiroptical Properties, and Photoresponsiveness of Optically Active Poly(m-phenyleneethynylene)s Containing Azobenzene Moieties
摘要:
The Sonogashira-Hagihara coupling polymerization of 3',5'-diiodo-4'-hydroxy-N-alpha-tert-butoxycarbonyl-D-phenylglycine ethyl-, hexyl-, and laurylamides 1a-c with p-nonsubstituted, cyano, hexyl, and methoxy 3,5-diethynylazobenzenes 2a-d was carried out to obtain optically active novel poly(m-phenyleneethynylene) with M-w values in the range from 6900 to 15 400 in 62-84% yields. CD and UV-vis spectroscopic data indicated that the polymers adopted thermally stable helical conformations in CH2Cl2 and N,N-dimethylformamide. Poly-(1b-2a) further formed a chirally aggregated structure. The azobenzene moieties of the polymers underwent reversible photoisomerization upon UV- and visible-light irradiation, accompanying the changes of the higher-order structures.
作者:Yves Aeschi、Sylvie Drayss-Orth、Michal Valášek、Felix Raps、Daniel Häussinger、Marcel Mayor
DOI:10.1002/ejoc.201700640
日期:2017.8.2
Two [2]rotaxanes have been assembled in water from modular subunits through CuI-catalyzed azide–alkyne “click” chemistry. For this purpose, 2,6-disubstituted naphthalene axles with solubilizing oligo(ethylene glycol) (OEG) chains (n = 1–5) and propargyl terminal groups were synthesized and examined for their propensity to form inclusion complexes with a dicationic Diederich-type cyclophane host. The
Selenium catalysed oxidations with aqueous hydrogen peroxide. Part 3: Oxidation of carbonyl compounds under mono/bi/triphasic conditions
作者:Gerd-Jan ten Brink、J.Martijn Vis、Isabel W.C.E Arends、Roger A Sheldon
DOI:10.1016/s0040-4020(02)00248-x
日期:2002.5
butylselenide (1), a recyclable catalyst for oxidation reactions with hydrogen peroxide, is described. The catalyst can be used for oxidation of aldehydes and ketones under monophasic, but also fluorous biphasic or fluorous triphasic conditions.
Iodinated cyanine dyes: a new class of sensitisers for use in NIR activated photodynamic therapy (PDT)
作者:Jordan Atchison、Sukanta Kamila、Heather Nesbitt、Kieran A. Logan、Dean M Nicholas、Colin Fowley、James Davis、Bridgeen Callan、Anthony P McHale、John F Callan
DOI:10.1039/c6cc09624g
日期:——
Iodinated cyanine dye 6a has been developed for use as a NIR excited photosensitiser in photodynamic therapy.
碘化青菁染料6a已经被开发用作近红外激发光敏剂在光动力疗法中的应用。
[EN] MICROBUBBLE-CHEMOTHERAPEUTIC AGENT COMPLEX FOR SONODYNAMIC THERAPY<br/>[FR] COMPLEXE D'AGENT CHIMIOTHÉRAPEUTIQUE À MICROBULLES POUR THÉRAPIE SONODYNAMIQUE
申请人:UNIV ULSTER
公开号:WO2017089800A1
公开(公告)日:2017-06-01
The invention relates to methods of sonodynamic therapy comprising the co-administration of a microbubble-chemotherapeutic agent complex together with a microbubble-sonosensitiser complex. It further relates to pharmaceutical compositions comprising these complexes and their use in methods of sonodynamic therapy and/or sonodynamic diagnosis. Such methods find particular use in the treatment of cancer, e.g. pancreatic cancer.
challenging. Here we first report on the synthesis and antimicrobial testing of the new NIR photosensitizers based on the iodinated xanthene-cyanine dyes. These new photosensitizers exhibit high antimicrobial efficacy on Staphylococcus aureus pathogens at low dye concentration (~0.5 μM) and low NIR light dose (24.3 J/cm2).
光敏剂(PSs)是化学实体,在曝光后能够产生细胞毒性物质,例如单线态氧超氧化物和自由基。PS用于光动力疗法应用(PDT)中以根除癌细胞,病原细菌,真菌和病毒。在黑暗条件下开发具有高光毒性和低毒性的可NIR活化的光敏剂具有挑战性。在这里,我们首先报道基于碘化x吨-花青染料的新型NIR光敏剂的合成和抗菌测试。这些新的光敏剂在低染料浓度(〜0.5μM)和低NIR光剂量(24.3 J / cm 2)下对金黄色葡萄球菌病原体表现出很高的抗菌功效。