Evidence for singlet-oxygen generation and biocidal activity in photoresponsive metallic nitride fullerene-polymer adhesive films.
Evidence for singlet-oxygen generation and biocidal activity in photoresponsive metallic nitride fullerene-polymer adhesive films.
复制标题
DOI：
10.1021/am900008v
复制
发表时间：
2009-04
影响因子：
9.5
通讯作者：
Phillips, J. Paige
中科院分区：
文献类型：
--
作者：
McCluskey, D. Michelle;Smith, Tiffany N.;Madasu, Praveen K.;Coumbe, Curtis E.;Mackey, Mary A.;Fulmer, Preston A.;Wynne, James H.;Stevenson, Steven;Phillips, J. Paige
关键词：
在空气白光照射下，用体积黏附分析方法测定了纯Sc3N@Ih-C80金属氮化富勒烯（MNF）与聚苯乙烯-嵌段-聚异戊二烯-嵌段-聚苯乙烯（SIS）共聚物压敏胶（PSA）共混物的黏附性能。粘性的减少是由于原位生成1O2和随后的光氧化交联的胶膜。并与经典富勒烯C60和C70进行了比较。这项工作首次证明了一般类型的金属氮化富勒烯产生1O2的能力，（M3N@C80）。在420 nm的照射下，2-甲基-2-丁烯在苯- 6中成功地光氧化为其烯丙基氢过氧化物，这一过程与C60的速率相当，为Sc3N@Ih-C80的敏化能力提供了额外的支持。2-甲基-2-丁烯的光氧化反应受富勒烯敏化剂浓度和氧气流量的影响。报道了Sc3N@Ih-C80在420 nm和536 nm处的摩尔消光系数。对本研究中制备的膜的潜在抗菌活性进行了评估，该膜源于原位生成的1O2，观察到革兰氏阳性和革兰氏阴性细菌的1倍杀伤。
The adhesive properties, as measured by bulk tack analysis, are found to decrease in blends of isomerically pure Sc3N@Ih-C80 metallic nitride fullerene (MNF) and polystyrene-block-polyisoprene-block-polystyrene (SIS) copolymer pressure sensitive adhesive (PSA) under white light irradiation in air. Reduction of tack is attributed to the in-situ generation of 1O2 and subsequent photooxidative crosslinking of the adhesive film. Comparisons are drawn to classical fullerenes C60 and C70 for this process. This work represents the first demonstration of 1O2 generating ability in the general class of metallic nitride fullerenes, (M3N@C80). Additional support is provided for the sensitizing ability of Sc3N@Ih-C80 through the successful photooxygenation of 2-methyl-2-butene to its allylic hydroperoxides in benzene-d6 under irradiation at 420 nm, a process which occurs at a comparable rate to C60. Photooxygenation of 2-methyl-2-butene is found to be influenced by the fullerene sensitizer concentration and oxygen gas flow rate. Molar extinction coefficients are reported for Sc3N@Ih-C80 at 420 nm and 536 nm. Evaluation of the potential antimicrobial activity of films prepared in this study stemming from the in-situ generation of 1O2 led to an observed 1 log kill for select Gram-positive and Gram-negative bacteria.
登录
查看更多内容
影响因子：
2.1
作者：
Dennler, G;Lungenschmied, C;Wertheimer, MR
通讯作者：
Wertheimer, MR
影响因子：
4.4
作者：
Kamanina, NV
通讯作者：
Kamanina, NV
影响因子：
11.4
作者：
Fang, Jiasong;Lyon, Delina Y.;Alvarez, Pedro J. J.
通讯作者：
Alvarez, Pedro J. J.
影响因子：
11.4
作者：
Badireddy, Appala Raju;Hotze, Ernest M.;Wiesner, Mark R.
通讯作者：
Wiesner, Mark R.
影响因子：
2.7
作者：
Bosi, S;Da Ros, T;Prato, M
通讯作者：
Prato, M