Underlined doi with rsc package

Question

I would like to have my DOIs underlined using the RSC package, if possible just the DOI, e.g. tweaking the DOI function rather than the hyperlink. The solution suggested here "underline the doi entry with natbib and abbrvnat style" does work for the RSC package even though it load natbib. Any idea ?

Nb: I have loaded every package and options related to bibliography I am using, even those redondants.

\documentclass[10pt,a4paper]{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{filecontents}

\usepackage[linktoc=all,hidelinks,bookmarksnumbered,pagebackref,xetex]{hyperref}
\PassOptionsToPackage{sort&compress,square,numbers}{natbib}
\usepackage[usedoi,linkdoi,super=false]{rsc}

% \usepackage[normalem]{ulem}% \uline
% \newcommand{\doi}[1]{doi: \uline{#1}}

\begin{filecontents}{biblio_test.bib}

@Article{hung2010practical,
  Title                    = {On the practical aspects of recording wideline QCPMG NMR spectra},
  Author                   = {Hung, Ivan and Gan, Zhehong},
  Journal                  = {J. Magn. Reson.},
  Year                     = {2010},
  Number                   = {2},
  Pages                    = {256--265},
  Volume                   = {204},

  Doi                      = {10.1016/j.jmr.2010.03.001},
  File                     = {:Publications\\1-s2.0-S1090780710000571-main.pdf:PDF},
  Owner                    = {Henri},
  Publisher                = {Elsevier},
  Timestamp                = {2015.09.03}
}

\end{filecontents}


\begin{document}
Some text.\cite{hung2010practical}

\bibliographystyle{rsc}
\bibliography{biblio_test}

    \end{document}

Answer 1

Since rsc.bst does not define a dedicated DOI macro we need to add that ourselves.

Find rsc.bst copy it to a location LaTeX can find it and rename it to, say, rsc-hcn.bst

Open rsc-hcn.bst and locate FUNCTION {format.doi} replace it by

FUNCTION {format.doi}
{ use.doi.all
    { doi empty$
        'skip$
        {
          link.doi
            {
              "\href{http://dx.doi.org/"
              doi *
              "}{" *
              bbl.doi * " \doiformat{" * doi * 
              "}}" *
            }
            { bbl.doi doi tie.or.space.connect }
          if$
          output
        }
      if$
    }
    'skip$
  if$
}

If you want the "DOI:" prefix to stick to the DOI, you can use bbl.doi * "~\doiformat{" * doi *.

In your document define \doiformat as desired.

\newcommand*\doiformat[1]{\uline{#1}}

MWE

\documentclass[10pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{filecontents}

\usepackage[linktoc=all,hidelinks,bookmarksnumbered,pagebackref]{hyperref}
\PassOptionsToPackage{sort&compress,square,numbers}{natbib}
\usepackage[usedoi,linkdoi,super=false]{rsc}

\usepackage[normalem]{ulem}% \uline
%\usepackage{soul}
\newcommand*\doiformat[1]{\uline{#1}}% or \ul from soul
\begin{filecontents}{\jobname.bib}

@Article{hung2010practical,
  Title                    = {On the practical aspects of recording wideline QCPMG NMR spectra},
  Author                   = {Hung, Ivan and Gan, Zhehong},
  Journal                  = {J. Magn. Reson.},
  Year                     = {2010},
  Number                   = {2},
  Pages                    = {256--265},
  Volume                   = {204},
  Doi                      = {10.1016/j.jmr.2010.03.001},
}
\end{filecontents}

\begin{document}
Some text.\cite{hung2010practical}

\bibliographystyle{rsc-hcn}
\bibliography{\jobname}
\end{document}

---

You can also use biblatex.

\documentclass[10pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{filecontents}
\usepackage[style=chem-rsc,doi=true]{biblatex}
\usepackage{hyperref}
\usepackage{soul}
\newcommand*\doiformat[1]{\ul{#1}}
\DeclareFieldFormat{doi}{%
  \mkbibacro{DOI}\addcolon\space
  \ifhyperref
    {\href{http://dx.doi.org/#1}{\doiformat{#1}}}
    {\doiformat{#1}}}

\begin{filecontents}{\jobname.bib}

@Article{hung2010practical,
  Title                    = {On the practical aspects of recording wideline QCPMG NMR spectra},
  Author                   = {Hung, Ivan and Gan, Zhehong},
  Journal                  = {J. Magn. Reson.},
  Year                     = {2010},
  Number                   = {2},
  Pages                    = {256--265},
  Volume                   = {204},
  Doi                      = {10.1016/j.jmr.2010.03.001},
}
\end{filecontents}

\addbibresource{\jobname.bib}

\begin{document}
Some text.\cite{hung2010practical}

\printbibliography
\end{document}