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Langmuir-blodgett films in advanced molecular engineering
Recent developments in characterization of Langmuir-Blodgett (LB) films have enabled us to design and study functionalized monolayers at the molecular level. Highly sophisticated molecular recognition systems have been developed using LB films. Monolayers at the air/water interface provide a unique environment for molecular recognition. We have developed new host-guest systems in which such monolayers bind water-soluble substances selectively through hydrogen bonding. Monolayers have been functionalized at their hydrophilic groups with diaminotriadine, urea, orotate, Kemp’s acid, guanidinium and resorcinol groups. Polar substrates such as nucleobases, nitrogen aromatics, amino acids, AMP, ATP and sugars have been found to bind to these monolayers efficiently from the aqueous subphase. They have association constants which are comparable to those reported for similar systems in aprotic solvents. This is in contrast to the generally held view that the interaction in simple organic receptors is suppressed in the aqueous micro-environment, and should be brought out from unique properties of monolayer surfaces. Molecular recognition of monolayer hosts exhibits various specific features owing to two-dimensional organization of binding sites at the air/water interface. Recent developments in characterization of Langmuir-Blodgett (LB) films have enabled us to design and study functionalized monolayers at the molecular level. Highly sophisticated molecular recognition systems have been developed using LB films. Monolayers at the air/water interface provide a unique environment for molecular recognition. We have developed new host- guest systems in which such monolayers bind water-soluble substances selectively through hydrogen bonding. Monolayers have been functionalized at their hydrophilic groups with diaminotriadine, urea, orotate, Kemp’s acid, guanidinium and resorcinol groups. Polar substrates such as nucleobases, nitrogen aromatics, amino acids, AMP, ATP and sugars have been found to bind to these monolayers efficiently from the aqueous subphase. They have association constants which are comparable to those reported for similar systems in aprotic solvents. This is in contrast to the generally held view that the interaction in simple organic receptors is suppressed in the aqueous micro-environment, and should be brought out from unique properties of monolayer surfaces. Molecular recognition of monolayer hosts exhibits various specific features owing to two-dimensional organization of binding sites at the air/water interface.
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Phthalazine – Wikipedia,
Phthalazine | C8H6N246 – PubChem