Amao, Yutaka published the artcileOptical CO2 sensor of the combination of colorimetric change of α-naphtholphthalein in poly(isobutyl methacrylate) and fluorescent porphyrin in polystyrene, Computed Properties of 596-01-0, the publication is Talanta (2005), 66(4), 976-981, database is CAplus and MEDLINE.
An optical CO2 sensor based on the overlay of the CO2 induced absorbance change of pH indicator dye α-naphtholphthalein in poly(iso-Bu methacrylate) (polyIBM) layer with the fluorescence of tetraphenylporphyrin (TPP) in polystyrene layer is developed. The observed luminescence intensity from TPP at 655 nm increased with increasing the CO2 concentration The ratio I 100/I 0 value of the sensing film consisting of α-naphtholphthalein in polyIBM and TPP in polystyrene layer, where I 0 and I 100 represent the detected luminescence intensities from a layer exposed to Ar and CO2 saturated conditions, resp., that the sensitivity of the sensor, is 192. The response and recovery times of the sensing film are <6.0 s for switching from Ar to CO2, and for switching from CO2 to Ar. The signal changes are fully reversible and no hysterisis is observed during the measurements. The highly sensitive optical CO2 sensor based on fluorescence intensity changes of TPP due to the absorption change of α-naphtholphthalein in polyIBM layer with CO2 is achieved.
Talanta published new progress about 596-01-0. 596-01-0 belongs to benzofurans, auxiliary class Benzofuran,Naphthalene,Alcohol,Ester, name is 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one, and the molecular formula is C28H18O4, Computed Properties of 596-01-0.
Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem