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Electronic Supplementary Material (ESI)

A water-stable luminescent Zn(II) coordination polymer based on 5-

sulfosalicylic acid and 1,4-bis(1H-imidazol-1-yl)benzene for highly

sensitive and selective sensing of Fe3+ ion

Tian-Yang Xub, Han Wanga, Jia-Ming Lia*, Ya-Li Zhaoc, Ya-Hui Hanb, Xiao-Li Wanga,

Kun-Huan Hea*, Ai-Rong Wang, Zhong-Feng Shia, b*

a: Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization, College of Petroleum and Chemical

Engineering, Beibu Gulf University, Qinzhou 535011, P. R. Chinab: School of Chemistry and Pharmacy, Guangxi Normal University, Key Laboratory

for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education), Guilin 541004 People’s Republic of China

c: College of International Studies, Beibu Gulf University, Qinzhou 535011, P. R. China

Figure S1. The asymmetric unit of 1.

Figure S2. The infrared spectrum of 1, H3ssa and 1,4-bib.

(a)

(b)

(c)Figure S3. Fluorescence intensities of 1 (1 mL) at 308 nm before and after the additional of Fe3+ (1mL, 10-3 mol/L) at various pH values in H2O solution.

Figure S4. Competition experiments at various pH values in H2O solution.

Table S1 The ICP results of 1 and 1-Fe3+ in filter cake after washing treatment.

Comounds Zn2+ (wt%) Fe3+ (wt%)1 12.41 -

1-Fe3+ 12.33 0.10