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A kind of water-soluble two-photon initiator and its preparation and application

An initiator, two-photon technology, applied in the field of water-soluble two-photon initiator and its preparation and application, can solve the problems of low initiation efficiency, residual organic solvent, poor water solubility of the initiator, etc., and achieves increased water solubility and low initiation threshold. , Overcome the effect of system complexity

Active Publication Date: 2020-08-25
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the deficiencies of poor water solubility, complex components of the initiator system, low initiation efficiency, and residual organic solvents of the existing two-photon polymerization processing initiators in the water phase, the present invention provides a water-soluble two-photon polymer with a large two-photon absorption cross-section. Initiator, and provide the preparation and application of this water-soluble two-photon initiator

Method used

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  • A kind of water-soluble two-photon initiator and its preparation and application
  • A kind of water-soluble two-photon initiator and its preparation and application
  • A kind of water-soluble two-photon initiator and its preparation and application

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preparation example Construction

[0035] The preparation of carbazole vinylpyridine derivatives refers to references [1] and [2].

[0036] [1] Gu J, Yulan W, Chen W-Q, et al. Carbazole-based 1D and 2Dhemicyanines: synthesis, two-photon absorption properties and application for two-photon photopolymerization 3D lithography [J]. New Journal of Chemistry, 2007, 31( 1):63-68.

[0037] [2] Zheng Y-C, Zheng M-L, Chen S, et al.Biscarbazolylmethane-basedcyanine: a two-photon excited fluorescent probe for DNA and selective cellimaging[J].Journal of Materials Chemistry B 2014,2(16),2301-2310 .

Embodiment 1

[0039] Preparation of water-soluble two-photon initiator A

[0040] Using molecule a as the guest molecule, the molecular structure is shown in a, using cucurbit [7] urea as the host molecule, the self-assembly method of the water-soluble two-photon initiator is as follows:

[0041]

[0042] S1. Weigh 0.36 mg molecule a and mix it with 200 μL ultrapure water.

[0043] S2. Add 2.3 mg of cucurbit [7] urea molecules to the above system, mix and vortex for 15 minutes, the final concentration of molecule a after dissolution is 2.0 mmol / L, and the final molar ratio to cucurbit [7] urea is 1: 5.

[0044] S3. Freeze-drying the above aqueous solution to obtain a water-soluble two-photon initiator A.

[0045] The UV-visible absorption spectra and single-photon fluorescence spectra of molecule a in aqueous solution before and after the interaction with cucurbit [7] urea, such as figure 1 shown. Due to the formation of inclusion complexes, the UV-Vis absorption spectrum of molecule...

Embodiment 2

[0048] Use the water-soluble two-photon initiator A in Example 1 to initiate two-photon polymerization in the aqueous phase to process the three-dimensional microstructure:

[0049]Weigh 1.5 mg of water-soluble two-photon initiator A and dissolve it in 200 μL of ultrapure water, then add 0.5 g of polyethylene glycol diacrylate (PEGda) monomer, stir evenly, and store in aluminum foil wrapping away from light. The processing threshold of the initiator obtained by processing two-dimensional polymer nanowires at different powers is 6.18 mW, and the laser power higher than the threshold is used for three-dimensional structure processing. Add the prepared photoresist dropwise on the center of a clean glass plate, use a titanium sapphire femtosecond laser as the light source, the center wavelength is 780nm, the pulse width is 80fs, the pulse repetition frequency is 80MHz, the output power is 9.2mW, the laser beam Through the magnification of 100 times and the numerical aperture NA of...

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Abstract

The invention discloses a water-soluble two-photon initiator as well as preparation and application thereof, belonging to the technical field of laser micro-nano processing. The water-soluble two-photon initiator is prepared by means of self-assembly of host molecules-cucurbituril and guest molecules-carbazole vinylpyridine derivatives. The water-soluble two-photon initiator provided by the invention has a larger two-photon absorption cross section, solves the problems of complicated initiator system, residual organic solvent and the like in the prior art, and directly induces two-photon polymerization as a one-component initiator in an aqueous phase. A three-dimensional structure having a low polymerization threshold and high resolution is prepared.

Description

technical field [0001] The invention relates to the technical field of laser micro-nano processing. More specifically, it relates to a water-soluble two-photon initiator and its preparation and application. Background technique [0002] Two-photon absorption means that under strong laser excitation, molecules or atoms can simultaneously absorb two photons of the same frequency or different frequencies, and transition from the ground state to the excited state through a "virtual state". Photopolymerization refers to the process in which the molecular weight of the polymer increases due to the absorption of light. The two-photon polymerization process is different from the traditional ultraviolet single-photon polymerization. It uses a photoinitiator with a large two-photon absorption cross-section to initiate the polymerization reaction, usually using a near-infrared laser , for high-precision polymerization processing of three-dimensional structures. This technology has be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/48G03F7/004
CPCC08F2/48G03F7/004
Inventor 郑美玲郑永超段宣明
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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