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. 2019 Nov 12;19(22):4932. doi: 10.3390/s19224932

Table 1.

Absorption and emission maxima, fluorescence lifetime, and quantum yield of PEMC in different solvents with their dielectric constants (from [27]).

Solvent Dielectric Constant λmaxabs/nm λmaxem/nm τav/ns Quantum Yield
Chlorobenzene 5.62 630 666 0.68 0.266
Toluene 2.38 609 649 0.58 0.202
Dibutyl ether 3.08 598 644 0.35 0.188
Diethyl ether 4.20 605 651 0.27 0.126
Butanol 17.51 642 670 0.36 0.058
2-Propanol 19.92 639 678 0.34 0.049
Ethanol 24.55 637 672 0.56 0.049
THF 7.58 624 671 0.21 0.044
1,4-Dioxane 2.21 595 648 0.57 0.041
Dichloromethane 8.93 648 665 0.31 0.022
Methanol 32.66 627 676 1.88 0.014
Acetone 20.56 633 676 0.1 0.012
Acetonitrile 35.94 636 679 2.34 0.011
Water 78.36 650 676 0.47 0.001
Nile Blue A (see [28]) - 630 659 - 0.27