DielectricConstant Emission Wavelength
384 nm 460 nm 520 nm 600 nm
ε=7.0 T1=0.84 ns (0.0265)
T2=1.89 ns (0.0234)
{1.0141}
T1=1.17 ns(-0.1625)
T2=84.48 ns(0.2190)
{1.0380}
T1=1.31 ns(-0.1884)
T2=84.81 ns (0.2165)
{1.1437}
T1=1.25 ns(-0.1987)
T2=83.78 ns (0.2149)
{1.1050}
ε=9.0 T1=1.31 ns(0.0359)
T2=2.27 ns(0.0118)
{1.0013}
T1=1.27 ns(-0.1811)
T2=73.43 ns (0.2046)
{1.0960}
T1=1.37 ns(-0.1811)
T2=70.43 ns (0.2094)
{1.0868}
T1=1.48 ns(-0.1678)
T2=70.70 ns (0.2115)
{1.0620}
ε=11 T1=1.09 ns(0.0152)
T2=2.41 ns(0.0080)
{0.9216}
T1=0.77 ns(-0.1723)
T2=73.19 ns (0.2130)
{1.0755}
T1=1.18 ns(-0.1780)
T2=69.83 ns (0.2214)
{1.1063}
T1=1.25 ns(-0.2169)
T2=71.79 ns (0.2301)
{1.1415}
ε=13 T1=0.8 ns(0.0120)
T2=2.11 ns (0.0121)
{1.0501}
T1=28.2 ns(0.1540)
T2=47.14 ns (0.0365)
{1.0610}
T1=1.09 ns(-0.1809)
T2=47.92 ns (0.2127)
{1.0374}
T1=1.01 ns(-0.1728)
T2=47.59 ns (0.2035)
{1.0714}
ε=15 T1=1 ns(0.0165)
T2=2.61 ns (0.0072)
{0.9989}
T1=13.08 ns (0.0382)
T2=27.86 ns (0.1719)
{1.0915}
T1=1.02 ns(-0.1933)
T2=26.59 ns (0.2341)
{1.0397}
T1=0.89 ns(-0.1968)
T2=26.76 ns (0.2353)
{1.0557}
ε=19 T1=1 ns(0.0152)
T2=2.63 ns (0.0085)
{1.0324}
T1=2.66 ns (0.0186)
T2=13.68 ns (0.0444)
{0.9930}
T1=0.99 ns(-0.0522)
T2=13.45 ns (0.0657)
{0.9909}
T1=0.97 ns(-0.0539)
T2=13.53 ns (0.0623)
{0.9887}
ε=21 T1=0.69 ns (0.0116)
T2=1.89 ns (0.0141)
{1.0576}
T1=1.4 ns(0.0331)
T2=6.16 ns(0.0449)
{0.9846}
T1=0.84 ns(-0.0670)
T2=5.96 ns (0.0831)
{1.0227}
T1=0.85 ns(-0.0680)
T2=5.91 ns (0.0811)
{0.9929}
Table 2: Life time values over the Py-DMA exciplex band and pyrene monomer emission at 384 nm for varying bulk dielectric constant (ε) of Benzene-Acetonitrile binary mixtures, values inside ( ) and { } represent pre-exponential factor and χ2 values respectively. (-) pre-exponential factor indicates growth. [Py]:[DMA]=10-4 M:6 × 10-2 M.