College;
of;
Chemistry;
and;
Molecular;
Engineering,;
Peking;
University,;
Beijing;
100871,;
China;
College;
of;
Chemistry;
and;
Molecular;
Engineering,;
Peking;
University,;
Beijing;
100871,;
China;
College;
of;
Chemistry;
and;
Molecular;
Engineering,;
Peking;
University,;
Beijing;
100871,;
China;
College;
of;
Chemistry;
and;
Molecular;
Engineering,;
Peking;
University,;
Beijing;
100871,;
China;
College;
of;
Chemistry;
and;
Molecular;
Engineering,;
Peking;
University,;
Beijing;
100871,;
China;
Department;
of;
Chemistry,;
Hong;
Kong;
Baptist;
University,;
Hong;
Kong,;
China;
Department;
of;
Chemistry,;
Hong;
Kong;
Baptist;
University,;
Hong;
Kong,;
China;
spiropyran,; sensor,; PVC; membrane,; zinc; ion,; fluorescent; spectroscopy.;