\begin{table}%t1
\par
    \caption{\label{t1}PANH species studied in this work.}
     %\centering
\par
    \begin{tabular}{lccc}
    \hline\hline
    \noalign{\smallskip}
    Name           &   Chemical formula & PANH$^{+}$  & H$^{+}$PANH\\
               &                   &   (${\it m/z}$)& (${\it m/z}$) \\
     \hline
    Quinoline      &    C$_{9}$H$_{7}$N  &  129  &      130\\
    Isoquinoline   &    C$_{9}$H$_{7}$N       & 129    &    130\\
    Benzo[h]quinoline &  C$_{13}$H$_{9}$N    & 179 & ...       \\
    Phenanthridine    &  C$_{13}$H$_{9}$N   & 179   &    180\\
    Acridine          &    C$_{13}$H$_{9}$N &  179   &    180\\
    Dibenzo[f,h]quinoline&   C$_{17}$H$_{11}$N &   229    & ...    \\
    \hline
    \end{tabular}
    \end{table}