\begin{figure}[htb!]
\includegraphics[width=\textwidth]{fig/HRE}
\caption{HR and RE plots of (a) \textbf{MBTPBA} (b) \textbf{TDBTA} and (c) \textbf{BPTBT}.}
\label{fgr:5}
\end{figure}
\begin{table}[]
\begin{tabular}{@{}lllllll@{}}
\toprule
\multirow{2}{*}{System} & \multicolumn{2}{c}{Fluorescence} & \multicolumn{2}{c}{Phosphorescence} & \multicolumn{2}{c}{ISC} \\ \cmidrule(l){2-7}
& Rate ($\times 10^8 s^{-1}$) & HT (\%) & Rate (s$^{-1}$) & HT (\%) & Rate ($\times 10^6 s^{-1}$) & HT (\%) \\ \midrule
MBTPBA & 21.60 & 99.35 & 21.7 & 84.99 & 1.38 & 87.61 \\
TDBTA & 0.08 & 99.52 & 12.7 & 100 & 0.17 & 100 \\
BPTBT & 4.81 & 7.33 & 9.76 & 93.98 & 672 & 100 \\ \bottomrule
\end{tabular}
\label{tab:}
\caption{Calcualted rate constants and HT contribution to that in thienylboranes.}
\end{table}