Molecular Design, Characterization, and Application of Multiinformation Dyes for Multidimensional Optical Chemical Sensings. 2. Preparation of the Optical Sensing Membranes for the Simultaneous Measurements of pH and Water Content in Organic Media

Hideaki Hisamoto, Yukiko Manabe, Hiroko Yanai, Hajime Tohma, Toshiki Yamada, Koji Suzuki

Research output: Contribution to journalArticle

71 Citations (Scopus)


Optical chemical sensing of pH and water content in organic solvents is proposed, using multiinformation dyes (MIDs) based on the support matrixes for the dyes. In this investigation, four kinds of merocyanine-type dyes having a polymerizable olefin unit as the MIDs were synthesized. These dyes were copolymerized with hydrophilic monomer molecules to obtain dye-immobilized optical chemical sensor (optode) membranes. In this case, selection of the monomer molecule gave optode membranes having different color change properties, because different monomer molecules provided different chemical environments around the immobilized dye. These optode membranes were used for the measurement of pH and water content in organic solvents. These membranes offered two-dimensional sensing information in one spectrum when they were employed for water content sensing in organic solvents, in which the maximum wavelength represents the water content and the absorbance at this wavelength represents the pH of the water present. These polymer membranes have a long lifetime, which can be adequate for practical use.

Original languageEnglish
Pages (from-to)1255-1260
Number of pages6
JournalAnalytical chemistry
Issue number7
Publication statusPublished - 1998 Apr 1


ASJC Scopus subject areas

  • Analytical Chemistry

Cite this