A novel inorganic-organic nanocomposite film was prepared and characterized by IR, UV-Vis, XRD and DTA-TG. IR and UV-Vis spectra show that the Keggin structure of SiW 12O 4- 40 polyanion is preserved in the composite ...A novel inorganic-organic nanocomposite film was prepared and characterized by IR, UV-Vis, XRD and DTA-TG. IR and UV-Vis spectra show that the Keggin structure of SiW 12O 4- 40 polyanion is preserved in the composite film and there is an interaction between H 4SiW 12O 40 and the organic substrate. The composite film showed a reversible photochromism. Under UV irradiation, the composite film turns blue and charge transfer occurs by oxidation of R-NH + 3 and reduction of SiW 12O 4- 40. When the irradiated samples are placed in air and sheltered from the light, they change back to their original color, and recover again when being exposed to UV light.展开更多
Under the condition of solvothermal synthesis,the viologen ligand 1,1′-bis(3-carboxyphenyl)-(4,4′-bipyri-dine)dichloride(H_(2)bcbpy·2Cl)and KI are coordinated with the metal cadmium ions.A case of thermochromic...Under the condition of solvothermal synthesis,the viologen ligand 1,1′-bis(3-carboxyphenyl)-(4,4′-bipyri-dine)dichloride(H_(2)bcbpy·2Cl)and KI are coordinated with the metal cadmium ions.A case of thermochromic coor-dination polymer[Cd(bcbpy)I_(2)]·2H_(2)O(1)was constructed.Complex 1 displays a 1D chain structure and exhibits thermochromic behavior.Under different temperature stimulation,the complex(ground)slowly changed from green to yellow-green,and with the increase of temperature,the color of complex 1 gradually deepened,and finally became orange-yellow.Therefore,complex 1 was prepared as a thermochromic film.In addition,we also performed electrochemical tests on complex 1,which showed that the complex is a semiconductor material.CCDC:2391802.展开更多
文摘A novel inorganic-organic nanocomposite film was prepared and characterized by IR, UV-Vis, XRD and DTA-TG. IR and UV-Vis spectra show that the Keggin structure of SiW 12O 4- 40 polyanion is preserved in the composite film and there is an interaction between H 4SiW 12O 40 and the organic substrate. The composite film showed a reversible photochromism. Under UV irradiation, the composite film turns blue and charge transfer occurs by oxidation of R-NH + 3 and reduction of SiW 12O 4- 40. When the irradiated samples are placed in air and sheltered from the light, they change back to their original color, and recover again when being exposed to UV light.
文摘Under the condition of solvothermal synthesis,the viologen ligand 1,1′-bis(3-carboxyphenyl)-(4,4′-bipyri-dine)dichloride(H_(2)bcbpy·2Cl)and KI are coordinated with the metal cadmium ions.A case of thermochromic coor-dination polymer[Cd(bcbpy)I_(2)]·2H_(2)O(1)was constructed.Complex 1 displays a 1D chain structure and exhibits thermochromic behavior.Under different temperature stimulation,the complex(ground)slowly changed from green to yellow-green,and with the increase of temperature,the color of complex 1 gradually deepened,and finally became orange-yellow.Therefore,complex 1 was prepared as a thermochromic film.In addition,we also performed electrochemical tests on complex 1,which showed that the complex is a semiconductor material.CCDC:2391802.
文摘基于Dawson型磷钼酸盐(NH_(4))_(6)P_(2)Mo_(18)O_(62)(P_(2)Mo_(18))可逆的氧化还原及变色性质,利用紫外-可见光谱可实现P_(2)Mo_(18)溶液对水合肼(N_(2)H_(4)·H_(2)O)及过氧化氢(H_(2)O_(2))的可逆检测.在P_(2)Mo_(18)溶液中加入等量N_(2)H_(4)·H_(2)O后,P_(2)Mo_(18)被还原,溶液由浅黄色变为蓝绿色,随着N_(2)H_(4)·H_(2)O浓度的增加,在可见区400~800 nm的吸收峰逐渐增强;在还原态P_(2)Mo_(18)溶液中加入等量H_(2)O_(2)后,还原态P_(2)Mo_(18)重新被氧化,溶液由蓝绿色变为浅黄色,随着H_(2)O_(2)浓度的增加,在可见区的吸收峰逐渐降低.以750 nm处的吸光度对N_(2)H_(4)·H_(2)O和H_(2)O_(2)的浓度做图,获得紫外-可见光谱法对N_(2)H_(4)·H_(2)O和H_(2)O_(2)检测的线性方程、线性检测范围及检出限,并利用紫外-可见动力学法和光谱法对该探针的响应时间、可逆性及抗干扰性进行研究.结果表明:该方法对N_(2)H_(4)·H_(2)O和H_(2)O_(2)的检出限分别为7.24×10^(-5),2.15×10^(-4)mmol/L;对N_(2)H_(4)·H_(2)O和H_(2)O_(2)检测的响应时间分别为44.8,23.9 min.
