title: A colorimetric and absorption ratiometric anion sensor based on indole & hydrazide binding units.
abstract: A colorimetric and absorption ratiometric anion sensor (L) based on indole and hydrazide binding units was designed and synthesized, and its recognition & sensing properties towards different anions were studied by naked-eye observations, UV-vis and (1)H NMR titration spectra. Sensor L could selectively recognize biologically important F(-), AcO(-) and H2PO4(-) in DMSO over other anions, along with a significant change in its color and absorption spectrum, resulting from the formation of corresponding 1:2 (L/F(-)) and 1:1 (L/AcO(-) and L/H2PO4(-)) complexes. The (1)H NMR titration experiments proved that sensor L experienced deprotonation of NH fragment and produced [HF2](-) species, whereas a stable H-bonding complex was formed in the presence of AcO(-) and H2PO4(-).
authors: State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, People's Republic of China.
authors: Linbo
authors: L
authors: Zou
authors: State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, People's Republic of China.
authors: Boren
authors: B
authors: Yan
authors: State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, People's Republic of China.
authors: Dingwu
authors: D
authors: Pan
authors: State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, People's Republic of China.
authors: Zan
authors: Z
authors: Tan
authors: State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, People's Republic of China. Electronic address: baoxp_1980@aliyun.com.
authors: Xiaoping
authors: X
authors: Bao
mesh_terms: D000085:Acetates / Q000032:analysis*; D003124:Colorimetry / Q000379:methods*; D005461:Fluorine / Q000032:analysis*; D007211:Indoles / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D010710:Phosphates / Q000032:analysis*; D011522:Protons; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*
chemical_list: D000085:Acetates; D007211:Indoles; D010710:Phosphates; D011522:Protons; D005461:Fluorine; C030374:indole
keywords: Absorption ratiometry; Colorimetric sensor; Hydrazide NH; Indole