Hg2+ detection and information encryption of new [1+1] lanthanide cluster

The sensing of heavy metal ion and information encryption are two very important research areas. Therefore, developing multi-functional materials capable of sensing heavy metal ions and encrypting information is highly important. In this work, three [1 + 1] lanthanide clusters [Ln(TFBA)3(dmp) (H2O)2]2 (Ln = Tb3+Tb1+1, Eu3+Eu1+1, Gd3+Gd1+1, HTFBA = 2,3,4,5-tetrafluorobenzoic acid, dmp = 4,7-dimethyl-1,10-phenanthroline) were designed and synthesized. Among them, Tb1+1 shows excellent luminescence sensing towards Hg2+ (Ex = 350 nm, Em = 545 nm). Results demonstrates the sensing with high selectivity, strong anti-interference, 20-s response time, high accuracy, excellent linear relationship in 0-20.0 μM, and a very low limit of detection (0.02 ppb). Furthermore, paper strips based on Tb1+1 is fabricated for visual detection of Hg2+ in real samples of tap water, lake water, human urine, and human serum. More interestingly, a new method for confidentiality of information is realized through multi-color anti-counterfeiting patterns with the [1 + 1] lanthanide cluster ink, based on the luminescence "on-off" sensing towards Hg2+.

Luminescence Tuning of Layered Rare-Earth Hydroxides (LRHs, R = Tb, Y) Composites with 3-Hydroxy-2-naphthoic Acid and Application to the Fluorescent Detection of Al3

Tunable luminescence (quenching or blue shift) of HNA/OS-LRH composites (HNA is 3-hydroxy-2-naphthoic acid; OS is the anionic surfactant of 1-octanesulfonic acid sodium; LRHs are layered rare-earth hydroxides, R = Tb³⁺, Y³⁺) in the solid state and delaminated state is reported, which is utilized as an effective fluorescent probe for detecting metal ions. HNA/OS species are intercalated into LRH layers to generate composites of HNA _xOS_{1- x}-LTbH ( x = 0.10, 0.15, 0.20 , 0.25) and HNA _yOS_{1- y}-LYH ( y = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30). In the solid state, LYH composites exhibit green emissions (from 493 to 504 nm) with a large blue shift in comparison to the 542 nm emission of free HNA^- anions, while in the delaminated state in formamide (FM), the composites display blue emission (480 nm) relative to the green emission (512 nm) of an HNA soltuion in FM. However, LTbH composites display coquenched luminescence in both the solid state and delaminated state. Also, HNA_0.25OS_0.75-1:1-LYH, HNA_0.25OS_0.75-1:2-LYH, and HNA_0.05OS_0.95-1:1-LYH (1:1 and 1:2 are HNA:NaOH molar ratios) show significantly elongated fluorescence lifetimes of 15.35, 14.37, and 12.72 ns, respectively, in comparison with free HNA-Na (6.44 ns), and their quantum yields of 23.40%, 21.97%, and 22.31%, respectively, are much larger than that of free HNA-Na (4.86%). The LTbH composite (HNA_0.25OS_0.75-1:1-LTbH) has also a relatively higher quantum yield of 12.46%. The HNA_0.25OS_0.75-1:1-LYH colloid exhibits excellent recognition selectivity for Al³⁺ over other metal ions (Mg²⁺, Co²⁺, Ni²⁺, Cu²⁺, Zn²⁺, Pb²⁺, Cd²⁺, and Hg²⁺) with distinct fluorescence sensitization. It shows an intense change in its fluorescence emission when it is bound to Al³⁺ ions, giving a lower detection limit of 6.32 × 10^-6 M. This is novel research on the fluorescence chemosensing of LRH composites.

Structural data of lanthanide complex constructed by 4-iodo-3-methyl benzoic acid and 4,7-dimethyl-1,10-phenanthroline

In this data article, we present the FT-IR and PXRD data of the lanthanide complexes constructed by 4-iodo-3-methylbenzoic acid (IMBA) and 4,7-dimethyl-1,10-phenanthroline (dmp). Detailed structure analysis, luminescence and sensing properties were discussed in our previous study, “Highly Luminescent Lanthanide Complexes as Bifunctional Sensor for Et₂O and Fe²⁺” (Zhao et al., 2018). Also, the data include the bond lengths and angles of [Ln₂(IMBA)₆(dmp)₂] (Ln=Eu³⁺, 1a; Ln=Gd³⁺, 1b; Ln=Tb³⁺, 1c).

Structural data of structure variation and luminescence of 3D, 2D and 1D lanthanide coordination polymers with 1,3-adamantanediacetic acid

In this data article, we report the structure, Fourier transform infrared spectroscopy(FT-IR), powder X-ray diffraction (PARD), luminescence decay, thermogravimetric analysis (TGA) and UV–vis data of three series Ln-MOFs. Detailed structure and luminescence properties were discussed in our previous study (Zhao et al., 2018) [1]. The data includes the structure patterns of ligand H₂ADA, FT-IR, PXRD and thermostability of Ln-MOFs in the air, detailed structure information for these structures are listed in Table 1, Table 2, Table 3, Table 4, Table 5, Table 6, Table 7.

Structural data of highly luminescent lanthanide complexes constructed by bis-tridentate ligand and as sensor for Et2O

In this data article, we present the structural and PXRD data of the lanthanide complexes constructed by bis-tridentate ligand tppz (2,3,5,6-tetra-2-pyridinylpyrazine). Detailed structure, luminescence and sensing properties were discussed in "highly luminescent lanthanide complexes constructed by bis-tridentate ligand and as sensor for Et₂O" (Zheng et al., 2018). The data includes the structure of Tb-complex, PXRD of Tb-complex, and also detailed structure information listed in Table 1, Table 2, Table 3.

Weak interactions cause selective cocrystal formation of lanthanide nitrates and tetra-2-pyridinylpyrazine

Two series of cocrystals Ln(NO₃)₅·H₂TPPZ are synthesized enlightening the lanthanide contraction effect and weak hydrogen bonding interactions in determining the selective cocrystallization, stability and energy transfer for luminescence.

A new luminescent lanthanide supramolecular network possessing free Lewis base sites for highly selective and sensitive Cu2+ sensing

Illustration of the probable quenching mechanism and the qualitative/quantitative relationship between Tb luminescent intensity and the analyte concentration.

Crystal structures and luminescent properties of new lanthanide(iii) complexes derived from 2-phenyl-4-pyrimidinecarboxylate

Five novel lanthanide complexes with diverse structural motifs are constructed under different reaction conditions and their photoluminescence properties are studied.

Highly luminescent lanthanide CPs based on dinuclear cluster: crystal structure and sensitive Trp sensor

A lanthanide coordination polymer is explored as Trp sensor. The possible sensing mechanism is the combination between Trp and Tb³⁺, which improves the antenna effect.

A luminescent terbium coordination polymer for sensing methanol

A new promising sensor for detecting methanol has been prepared, which exhibits highly sensitive and selective luminescence quenching to methanol.

Synthesis, crystal structure and study of magnetocaloric effect and single molecular magnetic behaviour in discrete lanthanide complexes

Hydrazone based four lanthanide complexes were synthesized where two gadolinium complexes show significant magnetocaloric effect and dysprosium analogues show SMM behavior.

Syntheses, supramolecular structures, magnetic and photochromic properties of six lanthanide complexes based on the 5-azotetrazolyl salicylic acid ligand

Six lanthanide complexes based on 5-azotetrazolyl salicylic acid were synthesized and their crystal structures, magnetic and photochromic properties were reported.

One step cathodically electrodeposited [Tb2(BDC)3(H2O)4]n thin film as a luminescent probe for Cu2+ detection

A luminescent [Tb₂(BDC)₃(H₂O)₄]_n film with a leaf-like morphology is fabricated on FTO by electrochemical method, the film exhibits highly selective detection of Cu²⁺.