Cucurbituril Induced Fused Ring Aromatic Hydrocarbon Organic Pollutants At Room Temperature Phosphorescence Study

Nowadays supramolecular chemistry or host-guest chemistry has become one of the hot fields of chemical research . Just as there is a field of molecular chemistry based on the covalent bond, there is a field of supramolecular chemistry, the chemistry of molecular assemblies and of Host-Guest Chemistry, Molecular Recognition. Cucurbit[n]urils are cyclic methylene-bridged glycoluril oligomers whose shape resembles a pumpkin. The defining features of cucurbit[n]urils are their two portals lined by carbonyl groups that provide entry to their hydrophobic cavity. Due to their special structure, cucurbit[n]urils are becoming a series new hosts after crown ether, cyclodextrin and calixarene, and are one of the important investigation of the supramolecular chemistry.The aromatic hydrocarbon compounds—one of the bigger pollution of the environment things of toxicity, mostly for deadly poison- is a very organic pollutant worthy of pay attention to.It is concerned to the existence appearance in the environment, to the influence mechanism of the environment and efficiently examination method etc. by environment chemistry. Interaction between cucurbit[n=6-8]urils with aromatic hydrocarbon compounds have been investigated by fluorescence spectrophotometry,, ultraviolet spectrophotometry and phosphorescence spectrophotometry.In the second charpter of the thesis, Naphthalene in the presence of potassium iodide was successfully determined with Na₂SO₃ as oxygen scavenger by cucurbit[n=6,7,8]uril induced room temperature phosphorescence (CB-RTP) .The effects of various factors such as concentration of Na₂SO₃, potassium iodide and cucurbit[n=6,7,8]uril were investigated for naphthalene RTP. The results shown that the naphthalene had a wide linear and high detection sensitivity. Compared with CD-RTP, The concentration of cucurbit[n=6,7,8]uril in CB-RTP were fewer one-two order of magnitude than concentration of cyclodextrin and more clarification. And a Room Temperature Phosphorescence for naphthalene was observerd with cucurbi[8]turil as the revulsant and 1,2-dibromorthane(DBE) as the heavy atom perturber, the RTP maximum wavelengthsλex/λem=273/508nm.On optimum experimental conditions,The RTP intensity was liner with naphthalene concentration in the range of 6×10^-6-1.33×10^-5 molL^-1 and 1.33×10^-5-8×10^-5molL^-1,respectively. The detection limit was 6.62×10^-8 molL^-1 .In the third charpter of the thesis, Interaction between cucurbit[n=6-8]urils with a-Naphthoxyacetic acid andβ-Naphthoxyacetic acid have been investigated by using phosphorescence spectrophotometry. The results showed that only cucurbi[6]turil serve as the revulsant and potassium iodide as the heavy atom perturber,Phosphorescence forα—Naphthoxyacetic acid can be observerd ,and only cucurbi[8]turil serve as the revulsant and potassium iodide as the heavy atom perturber,Phosphorescence forβ-Naphthoxyacetic acid can be observerd. The results also shown that theα-Naphthoxyacetic acid andβ-Naphthoxyacetic acid had a wide linear and high detection sensitivity.In the fourth charpter of the thesis, Interaction between cucurbit[n=6-8]urils with N-(l-naftyl)-etylendiaminu have been investigated by using fluorescence spectrophotometry and ultraviolet spectrophotometry.The experimental results reveal that only cucurbit[8]uril (Q[8]) can interact with guest N-(1-naftyl)-etylendiaminu with a ratio of 1:1; and the interaction is closely related with pH of a host-guest system. Q[8] form a 1:1 complex with N-(1-naftyl)-etylendiaminu at pH=12. And the effects of organic solvent and urea on fluorescence intensities of a host-guest system was discussed.