Mix characters with utf-8 characters on the same query

Hi guys!

There's a way to mix characters with utf-8 characters on the same query.
Some thing like this:

Character: "." (dot)
UTF-8: *\u002E*

(requisite* can't use regex*)

For this normal query:
select * from foo where email like 'email(at)company(dot)com '
Some thing like this:
select * from foo where email like 'email(at)company*\u002e*com '
But really I need on Full Text Search query:
select * from foo where (full_text_search_vector) @@
(to_tsquery('spanish', 'email(at)company*\u002e*com:*'))

Please don't think about why we're trying to match a simple dot in this
way.

Thx!