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公开(公告)号:US20250062038A1
公开(公告)日:2025-02-20
申请号:US18451410
申请日:2023-08-17
Inventor: Amjad Bajes KHALIL , Muhammad NAEEM , Hanoof Fahad ALKHODAIRY , Aasif HELAL
Abstract: A method of detecting SARS-COV in a sample includes contacting a metal-organic framework with at least one fluorophore-labeled single-stranded probe deoxyribose nucleic acid (DNA) to form a biosensor. The metal-organic framework of the method is zeolitic imidazolate framework-8 (ZIF-8), and the fluorophore-labeled single-stranded probe DNA (p-DNA) has a fluorescence signal at 513 to 517 nm. The method further includes contacting the sample with the biosensor in a solution, and the sample comprises a target sequence of SARS-COV. The target sequence of SARS-COV and the fluorophore-labeled single-stranded p-DNA of the method hybridize to form a double-stranded product. Following the step of the hybridization forming the double-stranded product, the method includes detecting the double-stranded product by observing a change in fluorescence.
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公开(公告)号:US20250035546A1
公开(公告)日:2025-01-30
申请号:US18913676
申请日:2024-10-11
Inventor: Aasif HELAL , Muhammed NAEEM , Mohammed FETTOUHI , Md. Hasan ZAHIR
IPC: G01N21/3577 , G01N21/17
Abstract: A method of detecting Hg2+ ions in an aqueous solution is described. The method includes contacting the aqueous solution with a metal-organic framework (MOF) chemosensor composite to form a mixture and monitoring a change in an absorption and/or a fluorescence profile of the MOF chemosensor composite in the mixture to determine a presence or absence of Hg2+ ions in the aqueous solution. The MOF chemosensor composite includes fluorescein hydrazide (FH); and a MOF, including nickel as a metal ion and at least one trimesic acid (BTC) ligand. A hydrazide group on the fluorescein hydrazide coordinates to the metal ion of the MOF.
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公开(公告)号:US20240400524A1
公开(公告)日:2024-12-05
申请号:US18329092
申请日:2023-06-05
Inventor: Aasif HELAL
IPC: C07D263/04 , C07D239/00 , C07D263/06 , C07D263/58
Abstract: A method of fixating carbon dioxide (CO2) to form a substituted oxazolidinone is described. The method includes mixing a metal-organic framework (MOF), at least one epoxide, and at least one aromatic amine to form a mixture. The method further includes contacting the mixture with a gas stream containing CO2 to react the CO2 in the gas stream with the epoxide and the aromatic amine to form a substituted oxazolidinone. The MOF is a MIL-68(In)-X MOF. X is of formula (I): where at least one of R1 to R4 is an amine-containing group, and R1 to R4 are independently an amine-containing group or a hydrogen.
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公开(公告)号:US20240011906A1
公开(公告)日:2024-01-11
申请号:US17857545
申请日:2022-07-05
Inventor: Aasif HELAL , Mohammad Mizanur RAHMAN , Muhammed NAEEM , Md. Eyasin ARAFAT , Muhammad USMAN
CPC classification number: G01N21/6428 , C09K11/06 , C07F15/045 , C09K2211/187 , C09K2211/182
Abstract: An europium doped Ni(BTC) Metal Organic Framework (MOF), Eu@Ni(BTC), as a sensor for detecting heteroaromatic compounds. Eu@Ni(BTC) shows selectivity towards thiophene and pyrrole with a detection limit of 0.2 and 8.4 ppm for thiophene and pyrrole, respectively. The sensor can be easily regenerated and can be used to analyze thiophene in water.
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公开(公告)号:US20170276607A1
公开(公告)日:2017-09-28
申请号:US15082808
申请日:2016-03-28
Inventor: Aasif HELAL
CPC classification number: C09B26/02 , C09B11/08 , G01N33/1813 , G01N33/582 , G01N33/84
Abstract: Fluorescent Schiff base compounds comprising a xanthene dye based moiety and an alkyl imidazole moiety. Methods of assessing these fluorescent Schiff base compounds as fluorescent probes for metal ions in Cu2+ chemosensing applications, methods of preparing the fluorescent Schiff base compounds and methods of detecting Cu2+ ions with the same are also provided.
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