Aromatic Polymer with Fused Ring π-Conjugated System
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Solution Overview
Problem
Conventional aromatic polymers with an aromatic ring in the main chain are insufficient in charge transfer property and light emission property when used as polymer fluorescent materials.
Innovation Solution
A novel aromatic polymer is developed with a specific repeating unit structure that forms a π-conjugated system, where π-conjugated carbon atoms in the main chain are bonded to π-conjugated carbon atoms, enhancing charge transfer and light emission capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional aromatic polymers with aromatic rings in the main chain are used, then structural stability is maintained, but charge transfer property and light emission property are insufficient
Solution Approach 1:
The patent changes the chemical structure parameters of the polymer by introducing specific repeating units with formula (1) containing arylene groups with fused ring structures or divalent heterocyclic compound groups with π-conjugated systems. This structural parameter change enhances charge transfer property while maintaining polymer stability.
Solution Approach 2:
The patent creates a composite polymer structure combining multiple functional groups (Ar1, Ar2, X1, Z) within the repeating unit formula (1). This composite approach integrates charge transfer functionality, light emission capability, and structural stability into a single polymer system.
2Reliability
If conventional aromatic polymers are used, then structural simplicity is maintained, but light emission efficiency is insufficient
Solution Approach 1:
The patent modifies the polymer structure by incorporating repeating units with specific π-conjugated systems and heterocyclic groups, changing the electronic parameters to enhance light emission efficiency while controlling structural complexity through defined molecular architecture.
Solution Approach 2:
The patent introduces specific functional groups (X1 representing divalent groups with nitrogen, phosphorus, or boron) at localized positions within the polymer chain, creating regions of enhanced light emission capability without complicating the entire polymer structure.
3Ease of manufacture
If polymer structure is simplified for ease of manufacture, then charge transfer property deteriorates
Solution Approach 1:
The patent optimizes the repeating unit structure with formula (1) to balance synthetic accessibility with enhanced charge transfer property, using commercially available building blocks and standard polymerization methods while achieving superior electronic properties.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The novel aromatic polymer exhibits improved charge injection and transfer properties, controlled light emission wavelength, and increased light emission efficiency, offering high functionality in electronic, chemical, and energy material fields with enhanced thermal and chemical stability.
Implementation Method 1
a group represented by the following formula (2), bonding to a carbon atom having a sp2 hybrid orbital, which carbon atom is contained in a ring of a ring structure of the arylene group having a fused ring structure or the divalent heterocyclic compound group having a π-conjugated system
Implementation Method 2
improvement in charge injection and transfer property, brought about by allowing the main chain having a charge transfer property to have a substituent capable of giving an improved charge injection and transfer property
Implementation Method 3
control of emitted light wavelength, brought about by allowing the main chain to have a functional substituent including a fluorescence- or phosphorescence-emitting dye
Data Source
AI summary
Disclosed is an aromatic polymer containing one or more repeating units represented by the following formula (1). (In the formula, Ar1 represents an arylene group having a fused ring structure or a divalent heterocyclic compound group having a π-conjugated system, and contains a group represented by the formula (2) below. This group is bonded to a carbon atom having a sp2 hybrid orbital which is contained in a ring of the ring structure of the arylene group having a fused ring structure or the divalent heterocyclic compound group having a π-conjugated system represented by Ar1. (In the formula (2), E1 represents a hydrogen atom, a halogen atom or a monovalent organic group; Ar2 represents a group having a divalent π-conjugated cyclic compound residue, and two Ar2's may be the same as or different from each other; X1 represents a divalent group selected from the group consisting of —NQ1-, —PQ2- and —BQ3-, and Q1-Q3 independently represent a substituent; Z represents a direct bond or a divalent linking group, and two Z's may be the same as or different from each other; mi's respectively represent 0 or 1; and in case where two X1's exist, they may be the same as or different from each other.)