A fiber optic sensor for water in organic solvents based on polymer swelling

Opto-Chemical and Opto-Immuno Sensors

“…int., new fiber sensing technique[318] Water in org. solv., polymer swelling (move of reflecting diaphragm)[47] Temp.-dep. sensor resp.…”

Fluorescence sensor for water based on PET (photo-induced electron transfer): Anthracene-bis(aminomethyl)phenylboronic acid ester

“…This feature can be attributed to the solvatochromic property of sensors, the aggregation of sensors or the formation of hydrogen bonding between the sensor and water molecules with the increase in the water content. [5][6][7][8][9][10][11][12][13] However, this fluorescence quenching system makes it difficult to detect trace amounts of water. Thus, recently, some research groups reported the fluorescence enhancement system [1][2][3][4][13][14][15] based on decomposition reaction [14] and spirolactone ring opening reaction [15] of sensor, or metal-organic framework.…”

The design of a novel fluorescent PET sensor for proton and water: A phenylaminonaphtho[1,2-d]oxazol-2-yl-type fluorophore containing proton donor and acceptor groups

“…When the nitrogen atom is protonated or strongly interacts with a cation, the electron transfer is prevented and a drastic enhancement of fluorescence is observed. On the other hand, a fluorescent dye for sensing water in organic solvent is also of interest in fundamental research on analytical chemistry and important for industrial applications [23][24][25][26]. Some fluorescent-water sensors have been developed, which exhibit the changes of their fluorescence lifetime and intensity with varying amount of water content in organic solvents [27,28].…”