1995
DOI: 10.1039/cs9952400197
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Sensors and switches from supramolecular chemistry

Abstract: Molecular recognition is one of the corner stones of supramolecular chemistry. Given any substrate (molecule, cation, or anion), the supramolecular approach is that an appropriate receptor, possessing structural and chemical features suitable for substrate recognition, can be designed. The keyword is shape. This concept is illustrated in Figure 1. signalling unit receptor substrate

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Cited by 753 publications
(349 citation statements)
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“…Photoresponsive supramolecular systems are of great signifi cance in the manipulation of intramolecular electron transfer dynamics, particularly for their potential application to nanoscale devices for use as cation sensors and switches [1][2][3][4][5][6][7] . Extensive studies on the characterization of fluoroionophores, including podand, crown ether, calixarene, cyclophane, and cyclodextrin derivatives with fl uorophores, have been carried out.…”
Section: Introductionmentioning
confidence: 99%
“…Photoresponsive supramolecular systems are of great signifi cance in the manipulation of intramolecular electron transfer dynamics, particularly for their potential application to nanoscale devices for use as cation sensors and switches [1][2][3][4][5][6][7] . Extensive studies on the characterization of fluoroionophores, including podand, crown ether, calixarene, cyclophane, and cyclodextrin derivatives with fl uorophores, have been carried out.…”
Section: Introductionmentioning
confidence: 99%
“…8 O planejamento de quimiossensores para finalidades analĂ­ticas tem despontado recentemente como um assunto de interesse geral. 6,9,10 A obtenção de um quimiossensor Ă© possĂ­vel se a molĂ©cula Ă© planejada para conter um sĂ­tio receptor, ao qual o analito deva se ligar, e uma unidade que sinalize a presença do analito ligado, como um cromĂłforo, um fluorĂłforo ou um centro ativo redox (Figura 2). 10 A associação do analito ao sĂ­tio de ligação provoca uma perturbação no microambiente do sensor, que se traduz em mudanças nas propriedades da unidade de sinalização.…”
Section: Introductionunclassified
“…Assim, muitos sistemas artificiais de detecção e de reconhecimento de espĂ©cies quĂ­micas que usam em suas estruturas sĂ­tios de reconhecimento carregados ou neutros para proporcionar estas interaçÔes do receptor com o substrato tĂȘm sido desenvolvidos. 6,9,10,[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] As espĂ©cies aniĂŽnicas sĂŁo essenciais em uma grande variedade de funçÔes nos mundos orgĂąnico e mineral, sendo reconhecido que 70-75% dos substratos e cofatores relacionados aos processos biolĂłgicos sĂŁo espĂ©cies negativamente carregadas. Assim, inĂșmeros exemplos podem ser oferecidos para mostrar a relevĂąncia dos Ăąnions em processos biolĂłgicos, industriais e ambientais.…”
Section: Introductionunclassified
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“…Despite the serious toxic effects on biological systems, efficient and sensitive in vivo monitoring methods for mercury have not been fully developed 3 . Because of their high sensitivity, simplicity and reproducibility, fluorescent chemosensor techniques [4][5][6][7][8] have been extensively employed for the detection of biologically important metal ions. However, most of the known mercury fluorescent chemosensors [9][10][11] do not meet the selectivity and sensitivity requirements for the in vivo, aqueous solution imaging assays.…”
Section: Introductionmentioning
confidence: 99%