curve 20 h 60 minute exposure shown as curve 20 i 90 minute exposure shown as curve 20 j and 120 minute exposure shown as curve 20 k fig2 b shows the optical band gap energies of activated zrpda with 0 minute shown as curve 24 a 60 minutes shown as curve 24 b and 120 minutes of uv exposure shown as curve 24 c in accordance with some embodiments of the invention fig2 c shows the optical band gap energies of pure ligand with 0 minute shown as curve 26 a 60 minutes shown as curve 26 b and 120 minutes of uv exposure shown as curve 26 c in accordance with some embodiments of the invention fig3 a shows photoluminescence spectra 30 of diluted h 2 pda in accordance with some embodiments of the invention fig3 b shows photoluminescence spectra 33 of zrpda before uv exposure in accordance with some embodiments of the invention fig3 c shows photoluminescence spectra 36 of zrpda with 120 minutes uv irradiation in accordance with some embodiments of the invention the hydrostability of zrpda synthesized using the methods described herein was verified by immersion under water for 672 hours the tested samples were analyzed by ft ir spectrometer and high resolution x ray diffractometer showing the stability of its crystal structure for example fig4 a shows powder xrd patterns of zrpda as synthesized shown as curve 40 a and soaked in.