An OFF-ON-OFF type of pH fluorescent sensor: Benzo[c,d]indole-based dimethine cyanine dye-synthesis, spectral properties and density functional theory studies

doi:10.1016/j.jlumin.2014.04.014

	An OFF-ON-OFF type of pH fluorescent sensor: Benzo[c,d]indole-based dimethine cyanine dye-synthesis, spectral properties and density functional theory studies
	Liu, Qi 1; Su, Xiao Hong 2; Wang, Lan Ying 1; Sun, Wei 1; Lei, Yi Bo 1; Wen, Zhen Yi 3
刊名	JOURNAL OF LUMINESCENCE
	2014-10-01
卷号	154 页码:124-130
关键词	Off-on-Off Type Of Ph Fluorescent Sensor Indole Ring Dimethine Cyanine Dye Intramolecular Charge Transfer (Ict) Solvent Effect
ISSN号	0022-2313
DOI	10.1016/j.jlumin.2014.04.014
文献子类	Article
英文摘要	We synthesized a novel OFF-ON-OFF type of pH-dependent fluorescent sensor: benzo[c,c,d]indole-based dimethine cyanine dye D1, with donor-pi-acceptor (D-pi-A) structure based on intramolecular charge transfer system (ICT), which employed dimethine cyanine dye as a fluorophore and pentavalent nitrogen NH+ group as a pH modulator, respectively. The product was identified by H-1 NMR, C-13 NMR, IR, UV-vis and HRMS. The investigation of spectral properties found that dye D1 showed excellent spectroscopic properties and its absorption maxima and fluorescence quantum yield were basically larger in protic solvent than in aprotic solvent. Meanwhile, the absorption spectra of D1 were revealed to hypochromatic-shift and the absorption intensity was gradually decreased along with the increase of pH value. Interestingly, dye D1 showed remarkable fluorescence when pH value was in the range of 6.00-9.80 with the peak at 8.21, which was defined as an OFF-ON-OFF type of pH-dependent fluorescent sensors based on ICT. In addition, dye D1 exhibited a high selectivity for H+ over other common ions, such as Cl-, K+, Fe2+ etc. Theoretical calculations based on density functional theory (DFT) were employed to provide a better understanding of this particular dye sensor. These results indicated that D1 would be able to act as an efficient pH-sensor and had a potential to play an important role in biological and medical study. (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词	PHOTOPHYSICAL PROPERTIES ; QUANTUM DOTS ; SYSTEM ; CELLS
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000340687600021
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/49291]
专题	中国科学院近代物理研究所
通讯作者	Wang, Lan Ying
作者单位	1.NW Univ Xian, Coll Chem & Mat Sci, Minist Educ, Key Lab Synthet & Nat Funct Mol Chem, Xian 710069, Shaanxi, Peoples R China 2.NW Univ Xian, Coll Life Sci, Xian 710069, Shaanxi, Peoples R China 3.NW Univ Xian, Inst Modern Phys, Xian 710069, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Liu, Qi,Su, Xiao Hong,Wang, Lan Ying,et al. An OFF-ON-OFF type of pH fluorescent sensor: Benzo[c,d]indole-based dimethine cyanine dye-synthesis, spectral properties and density functional theory studies[J]. JOURNAL OF LUMINESCENCE,2014,154:124-130.
APA	Liu, Qi,Su, Xiao Hong,Wang, Lan Ying,Sun, Wei,Lei, Yi Bo,&Wen, Zhen Yi.(2014).An OFF-ON-OFF type of pH fluorescent sensor: Benzo[c,d]indole-based dimethine cyanine dye-synthesis, spectral properties and density functional theory studies.JOURNAL OF LUMINESCENCE,154,124-130.
MLA	Liu, Qi,et al."An OFF-ON-OFF type of pH fluorescent sensor: Benzo[c,d]indole-based dimethine cyanine dye-synthesis, spectral properties and density functional theory studies".JOURNAL OF LUMINESCENCE 154(2014):124-130.