Luminescent Coordination Polymer for Picric Acid Detection and Treatment on Spinal Cord Injury Model Via Upregulating the trka Expression

A luminescent coordination polymer based on Tb(III) has been synthesized with the tripodal carboxylic acid ligand containing N,O codonors (H₂PBA = 5-[4-pyridin-3-yl-benzoylamino]-isophthalic acid) as ligand under solvothermal conditions. The chemical formula of this polymer is {[Tb₂(PBA)₃(H₂O)₃]·DMF·3H₂O}_n (1). Complex 1 has good sensitivity and selectivity to picric acid (PA). At 0-30 μmol/L, 1's quenching constant is 4.5 × 10⁴ L/mol. In the biological function study, the motor function of spinal cord-injured animals after different treatments was evaluated using the blood-brain barrier (BBB) method. The trka expression level on the neural stem cells after treatment was measured to reveal the underlying mechanism.