国产日产欧美精品-亚洲国产综合久久精品-色综合色国产热无码一-亚洲欧美日本国产,免费观看一区二区三区_在线观看片A免费不卡观看_亚洲а∨天堂久久精品_99久无码中文字幕一本久道

產(chǎn)品展廳收藏該商鋪

您好 登錄 注冊(cè)

當(dāng)前位置:
美國(guó)布魯克海文儀器公司>公司動(dòng)態(tài)>Effect of Swelling on Multiple Energy Transfer in Conjugated Polymer Nanoparticles

公司動(dòng)態(tài)

Effect of Swelling on Multiple Energy Transfer in Conjugated Polymer Nanoparticles

閱讀:277          發(fā)布時(shí)間:2017-7-27
 作者 Louis C. Groff‡, Yifei Jiang†, Xiaoli Wang§, and Jason D. McNeill*†

 Department of Chemistry, Clemson University, Clemson, South Carolina 29634, United States

 Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States

§ Department of Molecular and Cellular Medicine, Texas A&M University, College Station, Texas 77845, United States

 

摘要:Many key processes in conjugated polymers are strongly influenced by multiple energy transfer (i.e., exciton diffusion). We investigated the effect of solvent-induced swelling on the kinetics of multiple energy transfer in nanoparticles of the conjugated polymers PFBT and MEH-PPV. Multiple energy transfer between equivalent chromophores results in an increased rate of quenching by defects due to a cascading or funneling effect. The effects of swelling on energy transfer between polymer chromophores and the resulting exciton dynamics were modeled using a random walk on a lattice of chromophores. The simulation results show good agreement with experimental fluorescence quantum yield, and decay kinetics results at low to moderate THF concentrations. We found that the time scale for energy transfer between chromophores (5 ps for MEH-PPV nanoparticles and 100 ps for PFBT nanoparticles) is highly sensitive to swelling, slowing by an order of magnitude or more for swelled particles. The results support quenching by defects or polarons, amplified by multiple energy transfer or a cascade effect, as a likely explanation for the typically low fluorescence quantum yield of conjugated polymer particles as compared to the free polymer in solution as well as similar effects observed in thin films.

收藏該商鋪

請(qǐng) 登錄 后再收藏

提示

您的留言已提交成功!我們將在第一時(shí)間回復(fù)您~

對(duì)比框

產(chǎn)品對(duì)比 產(chǎn)品對(duì)比 聯(lián)系電話 二維碼 在線交流

掃一掃訪問(wèn)手機(jī)商鋪
010-62081908
在線留言
罗甸县| 冷水江市| 渭源县| 青铜峡市| 滨海县| 开鲁县| 江永县| 遂宁市| 云霄县| 交口县| 柳江县| 洱源县| 吉林省| 伊金霍洛旗| 高青县| 伊宁市| 常宁市| 乡宁县| 海门市| 喜德县| 中西区| 营口市| 贵阳市| 通渭县| 岳阳市| 金门县| 隆尧县| 长乐市| 金寨县| 沿河| 尼勒克县| 梁平县| 资兴市| 乳源| 买车| 易门县| 桃园县| 福海县| 大竹县| 滦平县| 民权县|