摘要
合成了以均二苯乙烯为荧光母体,一端以N,N-二甲基,一端以7-苯基-1-氧杂-4,10-二硫杂-7-氮杂环十二烷(NS2O)为受体的荧光探针(DMNS2O),并用1H NMR等技术对其进行了结构鉴定.通过X射线单晶衍射分析发现均二苯乙烯的3个苯环非共平面,二面角分别为24.6°和37.5°;在加入金属离子Ag+和Zn2+之后,探针在600nm处的荧光峰消失,420nm处产生新的荧光峰,其它金属离子的干扰较小.双光子荧光激发研究结果表明,当激发波长为750nm时,双光子荧光发射最强.
A novel two-photon fluorescent probe DMNS20 was synthesized and characterized via NMR and MS. It contains an 1-oxa-4,10-dithia-7-aza-cyclododecane receptor and a distyrylbenzene fluorophore. Crystal structure was detected through X-ray diffraction. Consequent analysis results show that both C = C double bonds exist as trans configuration, and the dihedral angle between the three benzene ring were 24. 6° and 37.5°, respectively. The maxima absorption and emission of DMNS20 in acetonitrile were at 460 nm and 600 nm, respectively. Variations of emission spectra were detected upon the addition of different metal ions. It was found that the addition of Ag^＋and Zn2^＋ to DMNS20 caused a new strong emission peak at 420 nm, the emission peak intensity at 600 nm decreased. Two-photon excitation fluorescence spectrum was obtained by excitation at 780 nm.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第7期1352-1355,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20076005)资助
关键词
双光子荧光探针
金属离子识别
均二苯乙烯
Two-photon fluorescent probe
Recognition of metal ion
Distyrylbenzene
