物理化学学报
物理化學學報
물이화학학보
ACTA PHYSICO-CHIMICA SINICA
2012年
10期
2471-2479
,共9页
李颖若%张洪涛%齐传民%郭雪峰
李穎若%張洪濤%齊傳民%郭雪峰
리영약%장홍도%제전민%곽설봉
Spiropyran%Chemical sensor%Logic gate%UV-Vis absorption spectrum%Fluorescent spectrum
Spiropyran%Chemical sensor%Logic gate%UV-Vis absorption spectrum%Fluorescent spectrum
Spiropyran%Chemical sensor%Logic gate%UV-Vis absorption spectrum%Fluorescent spectrum
We have designed and synthesized a new class of spiropyran derivatives (SP1-SP4) with functional chelating groups, such as pyridine or quinoline moieties and a methoxy group (―OMe), for use in metal ion sensing and information processing at the molecular level. It is notable that metal ions can favor coordination with chelating groups and facilitate the photoisomerization of spiropyran molecules from the closed form to the open merocyanine form without UV irradiation, thus leading to significant changes in their chemical and physical properties. UV-Vis absorption studies indicated that SP2 and SP4 exhibited metal ion-dependent reversible binding affinities that result in different hypsochromic shifts for the MC-Mn+complexes. These changes in color can be recognized by eye, thus offering an easy colorimetric method for metal ion detection. Further emission studies distinguished them as promising candidates for Zn2+detection with good sensitivity and selectivity. Moreover, on the basis of their absorption and fluorescence spectra, several combinational logic gates were constructed for information processing at the molecular level. These results demonstrate that spiropyran derivatives with desired functionalities show great potential not only for chemical or environmental sensors, but also for future molecular computing.
We have designed and synthesized a new class of spiropyran derivatives (SP1-SP4) with functional chelating groups, such as pyridine or quinoline moieties and a methoxy group (―OMe), for use in metal ion sensing and information processing at the molecular level. It is notable that metal ions can favor coordination with chelating groups and facilitate the photoisomerization of spiropyran molecules from the closed form to the open merocyanine form without UV irradiation, thus leading to significant changes in their chemical and physical properties. UV-Vis absorption studies indicated that SP2 and SP4 exhibited metal ion-dependent reversible binding affinities that result in different hypsochromic shifts for the MC-Mn+complexes. These changes in color can be recognized by eye, thus offering an easy colorimetric method for metal ion detection. Further emission studies distinguished them as promising candidates for Zn2+detection with good sensitivity and selectivity. Moreover, on the basis of their absorption and fluorescence spectra, several combinational logic gates were constructed for information processing at the molecular level. These results demonstrate that spiropyran derivatives with desired functionalities show great potential not only for chemical or environmental sensors, but also for future molecular computing.
We have designed and synthesized a new class of spiropyran derivatives (SP1-SP4) with functional chelating groups, such as pyridine or quinoline moieties and a methoxy group (―OMe), for use in metal ion sensing and information processing at the molecular level. It is notable that metal ions can favor coordination with chelating groups and facilitate the photoisomerization of spiropyran molecules from the closed form to the open merocyanine form without UV irradiation, thus leading to significant changes in their chemical and physical properties. UV-Vis absorption studies indicated that SP2 and SP4 exhibited metal ion-dependent reversible binding affinities that result in different hypsochromic shifts for the MC-Mn+complexes. These changes in color can be recognized by eye, thus offering an easy colorimetric method for metal ion detection. Further emission studies distinguished them as promising candidates for Zn2+detection with good sensitivity and selectivity. Moreover, on the basis of their absorption and fluorescence spectra, several combinational logic gates were constructed for information processing at the molecular level. These results demonstrate that spiropyran derivatives with desired functionalities show great potential not only for chemical or environmental sensors, but also for future molecular computing.
