Study of aggregation behavior of water insoluble metalloporphyrin (Zn) in LB film. (2018) - Saha, Mitu
Abstract: In the present communication, a water insoluble metalloporphyrin, 5, 10, 15, 20-Tetraphenyl-21H, 23H-porphine zinc (abbreviated as ZnTPP) has been used to prepare stable Langmuir monolayer at the air–water interface by allowing it to adsorb from the aqueous subphase, into the preformed Langmuir monolayer of stearic acid (SA). Surface pressure versus area per molecule (π-A) isotherm studies gave the thermodynamical behavior of the ZnTPP-SA mixed Langmuir monolayer formed at the air water interface. Access area per molecule (AE ) vs molefraction curve indicated the repulsive interaction between the two binary components in the mixed Langmuir monolayer. BAM images gave the visual evidence of the aggregation pattern of the mixed molecules at the air-water interface. UV-vis spectroscopic studies confirmed the formation of prominent J-band in the ultra-thin films.