Ni-Porphyrin Colorimetric Detection Across Explosive Classes

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Solution Overview

Problem

Existing detection methods for peroxide-, oxyhalide anion-, nitrate-, and nitramine-based explosives require multiple steps, including separate activation with acids or UV light, and are limited in their ability to detect a wide range of explosive compounds effectively.

Innovation Solution

A colorimetric method using a composition of Ni-porphyrin and an acid, optionally with an acid-stable solvent, allows for the detection of these explosives in a single or two steps without prior sample preparation, utilizing the Ni-porphyrin's ability to decompose peroxides and nitramines to generate distinct color changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple separate detection methods are used for different explosive classes, then detection coverage is improved, but device complexity and detection time increase

Engineering Contradiction:

Improvedetection coverageVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent employs a universal detection system where a single device integrates multiple detection capabilities for different explosive classes (peroxide, oxyhalide anion, nitrate, and nitramine-based explosives) through the use of a common Ni-porphyrin sensor material that responds differently to each explosive type, eliminating the need for separate specialized detection devices

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines multiple detection functions into one integrated system by merging the detection of four different explosive classes into a single analytical process using Ni-porphyrin as a universal sensing material, thereby reducing device complexity while maintaining broad detection coverage

Inventive Principle:

Principle #5Merging (Combining)

2Measurement precision

If multiple-step detection processes are used, then detection accuracy is improved, but detection time and productivity decrease

Engineering Contradiction:

Improvedetection accuracyVSAvoiddetection speed

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The Ni-porphyrin sensor material is pre-prepared and stabilized in solid form, allowing it to be ready for immediate use without requiring preliminary activation or preparation steps during the actual detection process, thus maintaining high detection accuracy while enabling rapid results

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent segments the detection process into a simple two-step procedure: (1) contact of the explosive sample with the Ni-porphyrin sensor, and (2) visual or instrumental reading of the color change, thereby simplifying the overall process while maintaining detection accuracy through the specific colorimetric response of Ni-porphyrin to different explosive classes

Inventive Principle:

Principle #1Segmentation

3Reliability

If sample preparation steps are required, then detection reliability is improved, but ease of operation and detection time worsen

Engineering Contradiction:

Improvedetection reliabilityVSAvoidease of operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The Ni-porphyrin sensor material performs self-activation and self-detection functions without requiring external activation steps or complex sample preparation. The sensor automatically responds to the presence of explosives through direct colorimetric interaction, making the detection process simple and easy to operate while maintaining reliable results

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent utilizes changes in the optical parameters (color) of the Ni-porphyrin sensor in response to different explosive classes, allowing direct detection without sample preparation. The sensor's color changes provide reliable differentiation between explosive types based on their specific interaction with Ni-porphyrin

Inventive Principle:

Principle #35Parameter changes

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 method provides high sensitivity and rapid detection of multiple explosive classes within 60 seconds, distinguishing between peroxide, oxyhalide anions, and nitrogen-based explosives through visual color changes, without the need for separate activation steps.

Implementation Method 1

the hydrogen peroxide is detected by the color change of a redox active dye oxidized by the hydrogen peroxide and a peroxidase enzyme

Methodology Applied

Scientific EffectOxidation: Oxidation

Implementation Method 2

there is only a limited number of colorimetric detection methods for peroxide-based explosives

Methodology Applied

Scientific EffectColor changes:

Data Source

PatentUS12436135B2Analytical process for detecting peroxide-, nitrate-, nitramine-, and nitrotoluene-based explosives

Publication Date: 2025.10.07 UNIVERSITY OF KIEL

AI summary

An analytical process for detecting compounds in a sample suspected of containing a peroxide-based compound, a nitrate-based compound, a nitrotoluene-based compound, or a nitramine-based compound includes treating the sample with a superbase and then contacting the sample with a composition. The composition includes or consists of a Ni-porphyrin and an acid and optionally an acid stable solvent.