# US 2014/0193923 A1 · Sensors and methods for detecting peroxide based explosives > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193923 A1 - Document ID: US20140193923A1 - Status: Published application - Kind: A1 - Application number: 13/865,846 - Filed: 2013-04-18 - Published: 2014-07-10 - Earliest claimed: 2012-04-18 - Inventors: Ling Zang; Jimin Han; Miao Xu - Web page: https://patentgrep.com/patent/US20140193923A1 ## CPC - G01N 31/228: {for peroxides} - G01N 33/0057: {Warfare agents or explosives} - Y10T 436/206664: Ozone or peroxide - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Methods, compositions, and systems for detecting explosives is disclosed and described. A sensor for detecting explosives can comprise a porous hydrophilic material modified with a series of π conjugated molecules with the general structure: [EW]-[CS]-[PED] wherein EW is an electron withdrawing group, CS is a conjugated system, and where PED is a pre-electron donating group. The porous hydrophilic material is capable of detecting hydrogen peroxide by reacting the aryl boronate group (or other Pre-ED groups) with the hydrogen peroxide to provide a fluorescent change. ## Claims ### Claim 1 A sensor for detecting hydrogen peroxide, comprising a porous hydrophilic material modified with π conjugated molecules with the following general structure: [EW]-[CS]-[PED] wherein EW is an electron withdrawing group, CS is a conjugated system, and where PED is a pre-electron donating group; and wherein the porous hydrophilic material is capable of detecting hydrogen peroxide upon reaction of the PED group with the hydrogen peroxide to provide an optical change. ### Claim 2 (depends on 1) A sensor of claim 1, wherein upon exposure to hydrogen peroxide the pre-electron donating group of the π conjugated molecules reacts with the hydrogen peroxide to form a π conjugated molecule having a general structure of: EW-CS-ED, wherein EW is an electron withdrawing group, CS is a conjugated system, and where ED is an electron donating group. ### Claim 3 (depends on 1) The sensor of claim 1, wherein the porous hydrophilic material is a thin film. ### Claim 4 (depends on 1) The sensor of claim 1, wherein the porous hydrophilic material comprises a cellulose fibril material. ### Claim 5 (depends on 1) The sensor of claim 1, wherein the porous hydrophilic material is a nanofiber surface-modified with a series of π conjugated molecules wherein the conjugated system of the π conjugated molecules is selected from the group consisting of: and combinations thereof, where X is C, N, S or O, Y is C, N, S, O or Si and n is a positive integer less than 7. ### Claim 6 (depends on 1) The sensor of claim 1, wherein the electron withdrawing group of the π conjugated molecules has a structure selected from the group consisting of: and combinations thereof. ### Claim 7 (depends on 1) The sensor of claim 1, wherein the pre-electron donating group of the π conjugated molecules has a general structure selected from the group consisting of and combinations thereof, wherein R1 is H, alkyl, aryl or ethylene glycol chain in either liner or branched form, and R2 is H, alkyl, aryl or ethylene glycol chain in either liner or branched form. ### Claim 8 (depends on 1) The sensor of claim 1, wherein the conjugated system, the electron withdrawing group, or both has a side chain attached thereto. ### Claim 9 (depends on 9) The sensor of claim 9, wherein the side chain modifies the hydrophilicity of the π conjugated molecule. ### Claim 10 (depends on 9) The sensor of claim 9, wherein the side chain has a structure selected from the group consisting of: and combinations thereof. ### Claim 11 (depends on 1) The sensor of claim 1, wherein conjugated link is an aromatic compound. ### Claim 12 (depends on 1) The sensor of claim 1, wherein the sensor can detect hydrogen peroxide present in amounts less than 1 ppm. ### Claim 13 (depends on 1) The sensor of claim 1, wherein the sensor can detect hydrogen peroxide present in an amount of about 1 ppb to about 500 ppb. ### Claim 14 (depends on 1) The sensor of claim 1, wherein the sensor can detect peroxide based explosives. ### Claim 15 (depends on 14) The sensor of claim 14, wherein the peroxide based explosive can include a compound selected from the group consisting of triacetone triperoxide, diacetone diperoxide, hexamethylene triperoxide diamine, and mixtures thereof. ### Claim 16 (depends on 1) The sensor of claim 1, wherein the porous hydrophilic material modified with a series of π conjugated molecules provide fluorescent change upon exposure to the hydrogen peroxide. ### Claim 17 (depends on 1) The sensor of claim 1, wherein the optical change upon exposure is fluorescence or color. ### Claim 18 (depends on 1) The sensor of claim 1, further comprising an optical detector associated with the porous hydrophilic material configured to measure the optical change. ### Claim 19 (depends on 18) The sensor of claim 18, wherein the optical detector is a fluorimetric detector. ### Claim 20 (depends on 1) The sensor of claim 1, wherein the sensor is disposable. ### Claim 21 A method for detecting explosives, comprising placing a porous hydrophilic material modified with a series of π conjugated molecules in an area having hydrogen peroxide and assessing an optical change of the porous hydrophilic material modified with a series of π conjugated molecules; wherein the series of π conjugated molecules having the following structure: [EW]-[CS]-[PED], and wherein EW is an electron withdrawing group, CS is a conjugated system, and where PED is a pre-electron donating group; and wherein the porous hydrophilic material is capable of detecting hydrogen peroxide upon reaction of the PED group with the hydrogen peroxide to provide an optical change. ### Claim 22 (depends on 21) The method of claim 21, wherein assessing of the optical change is by visual inspection. ### Claim 23 (depends on 21) The method of claim 21, wherein the assessing of the optical change is by a fluorescent or colorimetric device. ### Claim 24 (depends on 21) The method of claim 21, wherein the method provides for detection of hydrogen peroxide present in an amount of less than 1 ppm. ### Claim 25 (depends on 21) The method of claim 21, wherein the method provides for detection of hydrogen peroxide present in an amount of about 1 ppb to about 500 ppb. ### Claim 26 (depends on 21) The method of claim 21, further comprising disposing the porous hydrophilic material after use.