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Photoinduced nonlinear expansion coordination polymer and preparation method thereof

A coordination polymer, non-linear technology, applied in the field of photosensitive materials, achieves the effects of fast light conversion rate, mild reaction conditions and simple preparation method

Active Publication Date: 2022-01-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Examples of thermal expansion are currently reported in materials such as zeolites, metal cyanides, and coordination polymers (see: Burtch, N.C., S.J. Baxter, J. Heinen, A. Bird, A. Schneemann, D. Dubbeldam, A.P. Wilkinson, Adv. .Funct.Mater,2019,29,1904669.) However, there are few reports on materials whose expansion is controlled by light

Method used

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  • Photoinduced nonlinear expansion coordination polymer and preparation method thereof
  • Photoinduced nonlinear expansion coordination polymer and preparation method thereof
  • Photoinduced nonlinear expansion coordination polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1: Coordination polymer [Zn(iba)(tkpvb)Cl] n1 preparation of

[0052] Zinc nitrate hexahydrate (297mg, 0.1mmol), 1,2,4,5-tetrakis((E)-2-(4-pyridyl)vinyl)benzene (490mg, 0.1mmol) and p-iodobenzoic acid ( 248mg, 0.1mmol) of the mixture was added to a 25mL thick-walled pressure-resistant bottle, and then 10mL of a mixed solvent of N,N'-dimethylformamide and deionized water with a volume ratio of 2:3 was added, adjusted with 0.1M hydrochloric acid The pH of the system is about 5. Tighten the cap of the bottle, ultrasonically disperse for 10 minutes, place in an oven with temperature programmed to 120°C and heat for 8 hours, and cool down to room temperature naturally to obtain bright yellow blocky crystals [Zn(iba)(tkpvb)Cl] n1 (Zn-1). After washing with ethanol, the crystals were collected and dried in a 60°C oven. The yield: 462.8 mg (65%, based on 1,2,4,5-tetrakis((E)-2-(4-pyridyl)vinyl)benzene calculate).

[0053] Elemental analysis (%): C 41 h 31 ClN 4 ...

Embodiment 2

[0059] Example 2: Coordination polymer [Zn(iba)(poly-bpbpvpcb)Cl] n3 Preparation of (Zn-2a)

[0060] At room temperature, take a small amount of Zn-1 crystals on a clean glass slide, keep the distance between the light source and the crystals at 2cm, and irradiate with a 365nm wavelength LED lamp for 30 minutes to obtain 100% converted [2+2] Cycloaddition product [Zn(iba)(poly-bpbpvpcb)Cl] n3 (Zn-2a).

[0061] Elemental analysis (%): C 41 h 31 ClN 4 o 2 Zn; Theoretical: C 69.11, H 4.39, N 7.86; Found: C 69.1H4.23N 7.94

[0062] 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 .

[0063] The product was subjected to single crystal X-ray 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

[0064] Example 3: Coordination polymer [Zn(iba)(poly-bpbpvpcb)Cl] n3 Preparation of (Zn-2b)

[0065] At room temperature, take a small amount of Zn-1 crystals on a clean glass slide, keep the distance between the light source and the crystals at 2cm, and irradiate with a 385nm wavelength LED lamp for 30 minutes to obtain 100% converted [2+2] Cycloaddition product [Zn(iba)(poly-bpbpvpcb)Cl] n3 (Zn-2b).

[0066] Elemental analysis (%): C 41 h 31 ClN 4 o 2 Zn; Theoretical: C 69.11, H 4.39, N 7.86; Found: C 69.18, H 4.37, N 7.88.

[0067] The product was subjected to a single crystal X-ray diffraction test, and its crystallographic parameters are shown in Table 2.

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Abstract

The invention belongs to the technical field of photosensitive materials, and particularly relates to a photoinduced nonlinear expansion coordination polymer and a preparation method thereof. The coordination polymer is a bright yellow bulk crystal, and the chemical formula of the coordination polymer is [Zn (iba) (tkpvb) Cl] n1, wherein iba represents p-iodobenzoic acid radical, tkpvb represents 1, 2, 4, 5-tetra ((E)-2-(4-pyridyl) vinyl) benzene, and n is equal to 3000-60000; crystal parameters are as follows: (1) the crystal system is a monoclinic system; (2) the space group is Cc; (3) the values of a, b, c and V are shown in the description, beta is equal to 127.430(4) degrees; (4) Z is equal to 4; (5) F (000) is equal to 1680, R1 is equal to 0.1363, wR2 is equal to 0.3788, and GOF is equal to 1.620; and iba represents a p-iodobenzoic acid radical, tkpvb represents 1, 2, 4, 5-tetra ((E)-2-(4-pyridyl) vinyl) benzene, and n1 is equal to 3000 to 60000. The preparation method of the coordination polymer is simple, the reaction condition is mild, and the light conversion rate is high; and meanwhile, addition reaction can be carried out under irradiation of light with different wavelengths, the light-induced nonlinear expansion performance of the material is shown, and a corresponding isomeride compound is obtained.

Description

technical field [0001] The invention belongs to the technical field of photosensitive materials, and in particular relates to a photoinduced nonlinear expansion coordination polymer and a preparation method thereof. Background technique [0002] When some flexible materials are stimulated by the outside world, their structure will undergo dynamic changes, which will cause the material to undergo mechanical motion at the macro scale, such as bending, rotation, jumping, bursting, etc. These stimuli include pressure, heat, pH, guest molecules, light, magnetism, etc. Such materials have shown great application prospects in information storage / transmission, biomedical fields, and artificial intelligence fields. Among many stimuli-responsive materials, photoresponsive materials have the advantages of non-contact, adjustable stimulus intensity, and rapid response, which makes this type of material have great application potential. In order to control the direction of the response...

Claims

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Application Information

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IPC IPC(8): C08G83/00
CPCC08G83/008C08G61/02C08G61/00C08G2261/42C08G2261/334C08G2261/149C08G2261/15C08G2261/143C08G2261/312
Inventor 郎建平杨战永倪春燕
Owner SUZHOU UNIV
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