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Photoinduced shrinkage metal-organic framework compound

A metal-organic framework and photoshrinkage technology, which is applied in the field of photosensitive materials, achieves the effects of high volume control accuracy, mild reaction conditions, and fast photoconversion rate

Active Publication Date: 2019-01-15
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the properties of photoresponsive materials are closely related to their crystallinity, free volume, and orientation of photosensitive molecules, the "bottom-up" design and synthesis of anisotropic photoactuated materials with high sensitivity and fast response is still very important. there are great challenges

Method used

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  • Photoinduced shrinkage metal-organic framework compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: metal organic framework compound [Zn 2 (bdc) 2 (3-CH 3 -spy)] H 2 Preparation of O

[0053] Charge a mixture of zinc sulfate heptahydrate (143 mg, 0.5 mmol), 3-methylstyryl-4-pyridine (97 mg, 0.5 mmol) and 1,4-terephthalic acid (83 mg, 0.5 mmol) into 25 mL Add 10 mL of a mixed solvent of N,N'-dimethylformamide and deionized water with a volume ratio of 2:3 into a thick-walled pressure-resistant bottle. Tighten the bottle cap and ultrasonically disperse for 10 minutes. Then it was placed in an oven whose temperature was programmed to rise to 145° C. and heated for 8 hours. Cool naturally to room temperature to obtain colorless rod-shaped crystals [Zn 2 (bdc) 2 (3-CH 3 -spy)] H 2 O(Zn 2 -1). The collection was washed with ethanol, and then dried in an oven at 60°C. Yield: 138.2 mg (63%, calculated based on 3-methylstyryl-4-pyridine).

[0054] Elemental analysis (%): C 44 h 36 N 2 o 9 Zn 2 ; Theoretical: C 60.92, H 4.18, N 3.23; Found: C 61.3, H...

Embodiment 2

[0060] Example two: metal organic framework compound [Zn 2 (bdc) 2 (rctt-tcdp)](Zn 2 - Preparation of 2a)

[0061] At room temperature, take a small amount of Zn 2 -1 crystal on a clean glass slide, with the distance between the light source and the crystal at 2cm, irradiated with a 420nm wavelength LED lamp for 30 minutes to obtain a 100% converted [2+2] cycloaddition product [Zn 2 (bdc) 2 (rctt-tcdp)](Zn 2 -2a).

[0062] Elemental analysis (%): C 44 h 34 N 2 o 8 Zn 2 , theoretical value: C 62.21, H 4.03, N 3.30; found value: C 61.73, H 4.16, N 3.28.

[0063] Infrared spectrum (potassium bromide tablet method): 3440(w), 3066(w), 2938(w), 2359(w), 1938(w), 1824(w), 1640(s), 1504(m) ,1393(s),1223(w),1032(m),919(w),881(m),821(s),745(s),688(m),546(s)cm -1 .

[0064] The product was subjected to X-ray single crystal diffraction test. Its crystallographic parameters are shown in Table 2, and the single crystal structure diagram is shown in the attached Figure 5 . ...

Embodiment 3

[0065] Example three: metal organic framework compound [Zn 2 (bdc) 2 (rctt-tcdp)](Zn 2 - Preparation of 2b)

[0066] At room temperature, take a small amount of Zn 2 -1 crystal on a clean glass slide, with the distance between the light source and the crystal at 2cm, irradiated with a 405nm wavelength LED lamp for 30 minutes to obtain a 100% converted [2+2] cycloaddition product [Zn 2 (bdc) 2 (rctt-tcdp)](Zn 2 -2b).

[0067] Elemental analysis (%): C 44 h 34 N 2 o 8 Zn 2 , theoretical value: C 62.21, H 4.03, N 3.30; found value: 63.09, H 4.11, N 3.39.

[0068] Infrared spectrum (potassium bromide tablet method): 3439(w), 3023(w), 2936(w), 1940(w), 1823(w), 1640(s), 1504(m), 1393(s) ,1223(w),1032(m),952(w),882(m),822(s),744(s),706(m),545(s)cm-1 .

[0069] The product was subjected to X-ray single crystal diffraction test, and its crystallographic parameters are shown in Table 2.

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Abstract

The invention discloses a photoinduced shrinkage metal-organic framework compound. The compound is a colorless rod-like crystal with a chemical formula of [Zn<2>(bdc)<2>(3-CH<3>-spy)].H<2>O, wherein bdc is 1,4-terephthalate, and 3-CH<3>-spy is 3-methylstyryl-4-pyridine. The crystallographic parameters of the metal-organic framework compound are that (1) a crystal system is a monoclinic system; (2)a space group is P2<1> / c; (3) a is equal to 18.3715(15) angstroms, b is equal to 10.9360(10) angstroms, c is equal to 21.3401(16) angstroms, beta is equal to 112.578(2) DEGs, and V is equal to 3958.6(6) angstroms <3>; (4) D<c> is equal to 1.425 / g.cm<-3>, Z is equal to 4, and mu is equal to 1.268(Mo-Kalpha) / mm<-1>; (5) the total number of diffraction points is 60722, and the number of independentdiffraction points is 9099; and (6) F(000) is equal to 1744, R<1> is equal to 0.0691, wR<2> is equal to 0.1908, and GOF<c> is equal to 0.972. The invention also discloses a preparation methodfor the metal organic framework compound.

Description

technical field [0001] The invention relates to the technical field of photosensitive materials, in particular to a photoshrinkable metal organic framework compound, its isomers and a preparation method. Background technique [0002] Solid flexible materials have great applications in smart devices, memory storage, and drug release because they are mechanically responsive to external stimuli (such as light, electric / magnetic fields, heat, pH, and humidity) at the molecular level. prospect. To improve the performance of flexible materials, understanding the structure-function relationship of such materials is an important research field of solid-state chemistry, so more and more scientists are devoted to it. Generally speaking, external stimuli are bound to cause changes in the microstructure of such flexible materials, and such structural changes mainly lie in the vibration, breaking / recombination of chemical bonds within the framework of the main structure, the rotation of...

Claims

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Application Information

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IPC IPC(8): C07F3/06C07D213/127C07D213/06C08G83/00
CPCC07B2200/13C07D213/06C07D213/127C07F3/003C08G83/008
Inventor 郎建平史意祥张文华倪春燕
Owner SUZHOU UNIV
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