A method for improving photochromic response speed and color body time of Rhodamine

A technology of response speed and photochromic materials, which is applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of application limitations, short existence time of ring-opening bodies, etc., achieve fast response speed, simple preparation method, and large application value effect

Active Publication Date: 2018-02-02
INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the very short existence time of the ring-opening body of rhodamine photochromic materials, its application is limited, and researchers continue to increase the existence time of its ring-opening body in various ways.

Method used

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  • A method for improving photochromic response speed and color body time of Rhodamine
  • A method for improving photochromic response speed and color body time of Rhodamine
  • A method for improving photochromic response speed and color body time of Rhodamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Preparation of photochromic materials that improve rhodamine photochromic response speed and color body time:

[0031] The rhodamine photochromic material system combined with polyurethane varnish coating has a structure of a physical blend of polyurethane varnish and rhodamine derivatives, wherein the polyurethane varnish is a single component.

[0032] The preparation method of the photochromic material is:

[0033] Dissolve 8-15 mg of rhodamine derivatives into 10-15 mL of xylene solvent, and sonicate until it is completely dissolved.

[0034] Then dilute 0.1-1 mL of one-component polyurethane varnish with 10-15 mL of xylene solvent, and ultrasonically until it is completely dispersed.

[0035] Then add the xylene solution of the rhodamine derivative dropwise into the xylene solution of the polyurethane varnish coating, and stir at a high speed until the mixture is uniform.

[0036] Then spread the mixed solution evenly on the glass sheet, and dry it in a vacuum...

Embodiment 2

[0040] The present embodiment synthesizes rhodamine derivative R 2

[0041]Dissolve 0.78 mmol of 1-pyrenecarboxylic acid, 1.55 mmol of HATU, and 0.51 mL of DIPEA in 10 mL of DMF solvent. After reacting for 30 minutes, add 1 mmol of rhodamine B to react for 10 hours. After the reaction, use a vacuum pump to remove the solvent, add 10-100 mL of deionized water to obtain a precipitate, use ethyl acetate: n-hexane = 1:1 as eluent, and use column chromatography to obtain a pink solid R 2 , that is, the small molecule of the rhodamine derivative. 1 H NMR (400 MHz, CDCl 3 ) δ8.18 (d, J = 7.5 Hz, 2H), 8.08 – 8.00 (m, 2H), 7.99 – 7.92 (m, 4H), 7.88 (d, J = 8.2 Hz, 4H), 7.76 (d, J = 9.3 Hz, 2H), 7.69 (t, J = 5.5 Hz, 2H), 7.64 (d, J = 9.3 Hz, 4H), 7.43 (d, J = 7.4 Hz, 2H), 6.86 (dd, J = 20.1 , 8.7 Hz, 2H),6.51 (d, J = 7.7 Hz, 6H), 6.30 (d, J = 8.5 Hz, 2H), 6.23 (s, 4H), 5.77 (s,2H), 3.42 (dt, J = 13.7, 7.0 Hz, 8H), 3.11 (q, J = 6.8 Hz, 8H), 1.24 (t, J =6.9 Hz, 12H), 0.92 (t, J = 6.9...

Embodiment 3

[0043] Photochromic effect test:

[0044] According to the method of Example 1, dissolve the rhodamine R2 of Example 2 and the polyurethane varnish in xylene, mix them uniformly by ultrasonic physics, spread it on a glass sheet, dry the xylene solvent in a vacuum oven at 70°C to form a film, and record it as sample S 1 ;Similarly, we use Rhodamine R2 in Example 2 to spread on the glass sheet separately, and dry the xylene solvent in a vacuum oven at 70°C to form a film, which is recorded as sample S 2 . We did photochromic experiments on samples S1 and S2 respectively. We placed both the S1 and S2 in a dark box above a moderate intensity UV lamp that emits UV light at a wavelength of 365nm. The S1 sample showed obvious photochromic phenomenon in 2 minutes, the apparent color changed from light yellow to pink, and the fluorescence also changed from blue-green to orange-red. In contrast, no obvious photochromic phenomenon was found in S2 under 1 hour of light. So we say that...

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Abstract

Provided is a method for increasing rhodamine photochromic response speed and prolonging chromoplast time.According to the method, a polyurethane lacquer coating and a rhodamine solution are physically mixed to form a film, the rhodamine photochromic response speed is greatly increased, and the existing time of an open loop is greatly prolonged.Under irradiation of an ultraviolet lamp, the initial blue (blue-green) fluorescence of the rhodamine polyurethane film becomes orange red fluorescence fast, and the response process is completed within 2-3 minutes.After the open loop is stimulated with light, the open loop still does not disappear after a few days.The method is a physical blending method, and is easy to operate, low in price and good in universality.Due to the fact that the rhodamine photochromic material obtained through the method is very high in response speed and very long in open loop existing time, the development of the rhodamine photochromic material in practical application is greatly promoted.

Description

technical field [0001] The invention relates to a method for improving the photochromic response speed and color body time of rhodamine, and belongs to the technical field of photochromic material preparation. Background technique [0002] Photochromic is a special new material with environmental sensitivity. It refers to the phenomenon that when compound A is irradiated by light of a certain wavelength λ, it will produce compound B with different structures and spectral properties through corresponding chemical reactions or structural isomerization. This process is generally reversible: after another light irradiation of wavelength λ2 or heat treatment, B can change back to the previous compound A, and the change process is as follows: Figure 6 shown. [0003] Photochromic materials are a new type of functional materials. Because it can be widely used in cutting-edge fields such as optical information storage, optical conversion devices, and optical switches, it has attr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K9/02
CPCC09K9/02C09K2211/1088C09K2211/14
Inventor 曾国屏张军王小玉孙复钱胡银
Owner INST OF APPLIED CHEM JIANGXI ACAD OF SCI
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