In Situ Water-Compatible Polymer Entrapment: A Strategy
for Transferring Superhydrophobic Microporous Organic Polymers to
Water
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Abstract
Microporous
organic polymer nanoparticles bearing tetraphenylethylene
moieties (MOPTs) were prepared in the presence of poly(vinylpyrrolidone)
(PVP). The PVP was entrapped into the microporous network of MOPT
to form MOPT-P and played the roles of size control, porosity enhancement,
and surface property management. MOPT materials without PVP showed
superhydrophobicity with a water contact angle of 151°. In comparison,
the MOPT-P showed excellent water compatibility. Moreover, due to
the aggregation-induced emission property of tetraphenylethylene moieties,
the MOPT-P showed emission and excellent emission-based sensing of
nitrophenols in water with <i>K</i><sub>sv</sub> values
in the range of 1.26 × 10<sup>4</sup> ∼ 3.37 × 10<sup>4</sup> M<sup>–1</sup>. It is noteworthy that the MOPT-P used
water only as a sensing medium and did not require additional organic
solvents to enhance water dispersibility of materials. The MOPT-P
could be recovered and reused for the sensing at least five times