Is it problematic to use a Wikipedia article I wrote in my PhD thesis? I'm working on a specific subject, and I thought that sharing my bibliographical and synthesis work from peer-reviewed journals on Wikipedia could be a good idea. Moreover, there is no Wikipedia entry on that subject.

But as I will use that work for my PhD thesis, is this problematic because someone might think that I have plagiarised the material from Wikipedia?

Note that this question could apply to any similar collaborative encyclopedia, not just to Wikipedia, and that the article I'm writing is subject to collaborative change.



Edit : by synthesis work I do not mean :


  combine material from multiple sources to reach or imply a conclusion
  not explicitly stated by any of the sources


but


  reduce the information in lengthy sources to an encyclopedic length


More information on Wikipedias SYNTH policies and here

Also the question is related to sharing my bibliographical work on a collaborative platform, regardless to the platform policy (assuming I can), and potential problems re-using it afterwards, in a PhD thesis.
No, but make sure you cite it and mention it, to avoid being accused of copying and pasting from Wikipedia.

In any case, it is great that you have contributed to Wikipedia and I wish more people considered using pieces of their introductory chapters for Wikipedia. Just make sure that people know that you copied to, not from, Wikipedia. (I mean, the order is irrelevant, i.e. whether you first wrote text for Wikipedia or your thesis, but the authorship is.)