Synthesis And Studies The Properties Of Photochromic Diarylethene Probes With The Detection Of ClO~-,I~-,CN~-

Organic photochromic diarylethenes have become one of the most promising candidates of photoelectric materials because of their remarkable thermal stability,excellent fatigue resistance,and notable physical and chemical properties.Recently,the research of diarylethene with metal ions and anions recognition unit induced the multistate reversible changes by acid/base and cations/anions.The reversible changes could be potentially utilized to a great amount of practical applications ranging from molecular switches to multistate/multifunctional system sensors.The diarylethene probes mainly focus on the detection of metal ions in recent year,and the diarylethene probes for anions have rarely been reported.Researchers have come to realize the important functions of anions in the industry,life science,environmental chemistry,medicine and otherfields.Either deficiency or excess of anions would lead to several kinds of pollutions and physiological disorders.Thus the design and synthesis of receptors capable of sensing anions selectively have attracted increasing attention over the past years.The main challenges of anions recognition are more likely to the special structure of anions and the existence of a certain pH range.Therefore,it is extremely necessary to develop a probe for anions.Based on the remarkable diarylethene properties and the importance of anions,three categories of diarylethene derivative probe were constructed to recognize three important anions.The contents and results are as follows:1.The research summarized the basic properties of diarylethene compounds,and research states of diarylethene compounds as the fluorescence molecular switch and chemical sensor.Combination with the current situation and the needs of the proposed topic,the target of our research was brought out.2.Oxime was connected to diarylethene to synthesize DT-1O.The result shows that DT-10 exhibits good photochromic properties and can serve as a fluorescent chemosensor for highly selective recognition of ClO-in acetonitrile.3.Diaminomaleonitrile was connected to diarylethene to synthesize DT-20.Our research showed that DT-20 can detect ClO-in acetonitrile with high sensitivity and selectivity by dual-channel identification,even in the copresence of various other interference ions.Most remarkably,DT-2O has the capability to detect Cu2+ by the open-ring,closed-ring and fluorescent(triple-channel),even in the presence of other metal ions.What’s more,DT-20 was highly selective toward ClO-and Cu2+ not only in solution but also in the solid state.4.Two diarylethene probes(DT-30 and DT-40)were synthesized with 2-Hydrazinobenzothiazole unit.DT-30 exhibited dual-channel responses for I-in tetrahydrofuran.The photochromism and fluorescence of DT-30 also exhibited multi-addressable behaviors by the stimulation of between UV/Vis and I-.DT-40 only shows high selectivity,and sensitivity towards I-by the absorption.In addition,the absorption of DT-30 and DT-40 exhibited obvious recognition for CN-by the naked eye act as a colorimetric sensor.