Barium-based coordination polymer: A bi-functional fluorescent sensor for Fe3+ and nitroaromatic molecular detection

A new 2D coordination polymer [Ba(Nyaia)(H 2 O)] n 1 (H 2 Nyaia = 5[(naphthalene1-methylene)amino]-isophthalic acid) was obtained and structurally characterized. Compound 1 shows good fluorescence sensing performance in detecting Fe 3+ and nitroaromatic compounds. This result indicates that compound 1 has potential application value in bi-function fluorescent sensing materials. • A new 2D coordination polymer [Ba(Nyaia)(H 2 O)] n 1 (H 2 Nyaia = 5[(naphthalene1-methylene)amino]-isophthalic acid) was prepared. • This work provides a strategy for the design and synthesis of a bi-function fluorescent sensor. • Compound 1 has highly sensitive for the detection of Fe 3+ and nitroaromatic compounds with the K sv in 10 5 M −1 value. It is important to develop a simple and multi-response fluorescence sensor for practical applications. Coordination polymer materials are widely used in fluorescence sensor design due to their excellent photoluminescence properties. Herein, a new 2D coordination polymer [Ba(Nyaia)(H 2 O)] n 1 (H 2 Nyaia = 5-[(naphthalene-1-methylene)amino]-isophthalic acid) with good thermal stability was prepared through H 2 Nyaia and barium(II) nitrate under the solvothermal method. Compound 1 as a bi-functional fluorescent sensor has highly sensitive fluorescence quenching for detecting Fe 3+ with the quenching constant ( K sv ) value of 6.57 × 10 5 M −1 and 4-nitrophenol (4-NP) with the K sv value of 4.44 × 10 5 M −1 .