Related Experiment Video
Updated: Jun 5, 2026

Electroactive Polymer Nanoparticles Exhibiting Photothermal Properties
Published on: January 8, 2016
Two NDI-Based Multi-Stimuli-Responsive Coordination Polymers: Photo-Electro-Thermochromism, Detection of
Shuqi Zhang1, Xin Shi1, Jinghan Zhang1
1Heilongjiang Key Laboratory of Photoelectric Functional Materials, College of Chemistry and Chemical Engineering, Mudanjiang Normal University, Mudanjiang 157011, People's Republic of China.
Abstract:
Two naphthalene diimide (NDI)-based coordination polymers (CPs), namely {[Cd(BENDI)]·DMF·H2O}n (MDJNU-25) and {[Cd(BENDI)]·DMA·H2O}n (MDJNU-26), were successfully synthesized via a solvothermal method using Cd(NO3)2·4H2O and N,N'-bis(4-ethylphenyl)-1,4,5,8-naphthalene diimide (H2BENDI) in DMF and DMA, respectively. Both CPs exhibit reversible photochromic, electrochromic, and thermochromic properties. Structural analysis reveals that the variation in solvent modulates the crystal packing, resulting in different donor-acceptor (D-A) distances between MDJNU-25 and MDJNU-26. Notably, MDJNU-26 possesses a shorter D-A distance and a faster photoresponse rate than MDJNU-25. Furthermore, both CPs exhibit obvious color changes and high sensitivity to ammonia vapor and organic amines. Fluorescence sensing reveals that elevated antibiotic concentrations enhance quenching, with tetracycline hydrochloride giving the strongest response. The quenching mechanism is attributed to the synergistic effects of the internal filter effect (IFE), fluorescence resonance energy transfer (FRET), and photoinduced electron transfer (PET). TDDFT calculations were used to explore the photochromic and antibiotic-sensing mechanisms. These CPs perform excellently in message encryption and QR code anticounterfeiting, making them promising candidates for multistimuli-responsive systems.
Related Concept Videos
Modified-Release Drug Delivery Systems: Stimuli-Activated
Stereoisomerism
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Anionic Chain-Growth Polymerization: Overview

