Search results for: Muhammad Nadeem Akhtar

Items from 1 to 20 out of 31 results

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Heterometallic decanuclear [Fe₆–Ln₄] coordination clusters with enzymatic mimic activity: Synthesis, structures, magnetic properties, and evaluation of catecholase activity

Muhammad Nadeem Akhtar, Murad A. AlDamen, M. Shahid, M. Shahwaz Ahmad, more

Applied Organometallic Chemistry > 36 > 6 > n/a - n/a

Three [Fe₆‐Ln₄] clusters are isolated through N‐methyldiethanolamine (H₂mdea) and 3,5‐dinitrobenzoic acid (Hdnbz) acting as ligands together with sodium azide. The X‐ray study demonstrates that these compounds are isostructural formulated as [Fe₆Ln₄(μ₄‐O)₂(μ₃‐OH)₂(mdea)₆(dnbz)₈(N₃)₄]·MeCN·aH₂O·bCH₂Cl₂ (where Ln = Tb (1), a = 2, b = 3; Ho (2), a = 2, b = 2; Er (3), a = 1, b = 1). All these compounds...

article

Comparing the application of conventional and supercritical CO₂ extracts of green tea; storage stability and sensory acceptance of coriander sauce

Faiza Ashfaq, Ahmad Bilal, Masood Sadiq Butt, Saima Tehseen, more

Journal of Food Processing and Preservation > 45 > 12 > n/a - n/a

Green tea extract is anticipated to improve storage stability of coriander sauce and hence employed in the development of sauces; S₁ carrying 3% of conventional extract (epigallocatechin gallate; EGCG 65.88 ± 2.38 mg/g D.W.) and S₂ containing 2.56% of supercritical CO₂ extract (EGCG 77.23 ± 2.86 mg/g D.W.) then compared against control (S₀). During storage (4°C), numerous parameters were studied...

article

The role of hydrogen bonding in π···π stacking interactions in Ni(II) complex derived from triethanolamine: synthesis, crystal structure, antimicrobial, and DFT studies

Muddasra Rubab, Muhammad Nadeem Akhtar, Wiktor Zierkiewicz, Mariusz Michalczyk, more

Research on Chemical Intermediates > 2019 > 45 > 11 > 5649-5664

A complex, Ni(C₆H₁₅NO₃)₂]·2C₇H₅O₂ (1) has been synthesized from the reaction of nickel salt with triethanolamine (TEA) and benzoate in MeOH and characterized by FTIR, elemental analysis and single crystal X-ray diffraction. The complex exhibits moderate cytotoxicity against bovine erythrocytes (15%). Furthermore, high bacterial biofilm inhibition (90%) was recorded against Escherichia coli and moderate...

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Supertetrahedral T2 clusters in 3d-4f {Fe4Ln6}: Synthesis, crystal structure, magnetic and photoluminescent properties

Muhammad Nadeem Akhtar, Xiao-Fen Liao, Yan-Cong Chen, Murad A. AlDamen, more

Inorganica Chimica Acta > 2018 > 482 > C > 240-245

Two new isomorphous Iron(III)-lanthanide(III) coordination clusters of general formula [Fe₄Ln₆(bpte)₄(μ₄-O)₄(EG)₄(μ₃-OMe)_3.3(μ₃-Cl)_0.70Cl₂(MeOH)₂][Fe₄Ln₆(bpte)₄(μ₄-O)₄(EG)₄(μ₃-OMe)₄Cl₂(MeOH)₂]·30H₂O·MeOH (H₂bpte = 1,2-bis(3-(pyridin-2-yl)-1H-1,2,4-triazol-5-yl)ethane, EG = ethylene glycol, Ln = Dy(1), Ho(2)) have been successfully synthesized under hydrothermal conditions. The crystal structure of...

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Enhancing single-molecule magnet behavior of linear Co^II-Dy^IIICo^II complex by introducing bulky diamagnetic moiety

Guo-Zhang Huang, Ze-Yu Ruan, Jie-Yu Zheng, Jie-Yi Wu, more

Science China Chemistry > 2018 > 61 > 11 > 1399-1404

Single-molecule magnets (SMMs) are regarded as promising candidates for ultrahigh-density storage, quantum information processing and molecular spintronics. It is a crucial challenge for chemists to modulate magnetic dynamics of SMMs. Here, we successfully synthesized two 3d-4f polynuclear compounds [Co₂Dy(TTTT^Cl)₂(MeOH)]NO₃·3MeOH (1) and [Co₂Dy(TTTT^Cl)₂ (MeOH)][Co(HTTTT^Cl)](NO₃)₂·2.5MeOH·2H₂O (2),...

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Facile synthesis of N- (4-bromophenyl)-1- (3-bromothiophen-2-yl)methanimine derivatives via Suzuki cross-coupling reaction: their characterization and DFT studies

Komal Rizwan, Nasir Rasool, Ravya Rehman, Tariq Mahmood, more

Chemistry Central Journal > 2018 > 12 > 1 > 1-9

A variety of imine derivatives have been synthesized via Suzuki cross coupling of N-(4-bromophenyl)-1-(3-bromothiophen-2-yl)methanimine with various arylboronic acids in moderate to good yields (58–72%). A wide range of electron donating and withdrawing functional groups were well tolerated in reaction conditions. To explore the structural properties, Density functional theory (DFT) investigations...

article

Palladium(0) catalyzed Suzuki cross-coupling reaction of 2,5-dibromo-3-methylthiophene: selectivity, characterization, DFT studies and their biological evaluations

Komal Rizwan, Muhammad Zubair, Nasir Rasool, Tariq Mahmood, more

Chemistry Central Journal > 2018 > 12 > 1 > 1-12

Thiophene derivatives have shown versatile pharmacological activities. The Suzuki reaction proved a convenient method for C–C bond formations in organic molecules. In the present research work novel derivatives of 2,5-dibromo-3-methylthiophene (3a–k and 3l–p) has been synthesized, via Suzuki coupling reaction in low to moderate yields. A wide range of functional groups were well tolerated in reaction...

article

Optimized production and advanced assessment of biodiesel: A review

Muhammad Asif Hanif, Shafaq Nisar, Muhammad Nadeem Akhtar, Numra Nisar, more

International Journal of Energy Research > 42 > 6 > 2070 - 2083

Biodiesel production is profitable only under special conditions. Technical challenges including methods to make the transesterification reaction more energy efficient and faster by using catalysts, controlling reaction conditions more efficiently in narrow range, or selection of appropriate feedstocks should be properly addressed to make biodiesel economical viable fuel. Cradle to grave assessment...

article

Correction to: Biological Evaluation of Copper Complexes Derived from O- and N-, O-Donor Ligands

Muhammad Nadeem Akhtar, Muhammad Shahid, Masaaki Sadakiyo, Muhammad Ikram, more

Pharmaceutical Chemistry Journal > 2018 > 51 > 10 > 946-947

The title should read: BIOLOGICAL EVALUATION OF COPPER COMPLEXES DERIVED FROM O- AND N-, O-DONOR LIGANDS

article

Design, synthesis and cytotoxic effects of curcuminoids on HeLa, K562, MCF-7 and MDA-MB-231 cancer cell lines

Siti Noor Hajar Zamrus, Muhammad Nadeem Akhtar, Swee Keong Yeap, Ching Kheng Quah, more

Chemistry Central Journal > 2018 > 12 > 1 > 1-10

Background Curcumin is one of the leading compound extracted from the dry powder of Curcuma longa (Zingiberaceae family), which possess several pharmacological properties. However, in vivo administration exhibited limited applications in cancer therapies. Results Twenty-four curcumin derivatives have synthesized, which comprises cyclohexanone 1–10, acetone 11–17 and cyclopentanone 18–24 series....

article

Alkoxo- and carboxylato-bridged hexanuclear copper(II) complex: Synthesis, structure and magnetic properties

Muhammad Nadeem Akhtar, Murad A. AlDamen, Yan-Cong Chen, Masaaki Sadakiyo, more

Inorganic Chemistry Communications > 2017 > 83 > C > 49-51

Reaction of copper(II) nitrate trihydrate with N,N-dimethylethanolamine (dmea) and pivalic acid in methanol led to the hexanuclear copper(II) complex Cu₆(η¹:μ₂-C₄H₁₀NO)₄(η¹:η¹:μ₂-C₅H₉O₂)₄(η¹:μ₁-C₅H₉O₂)₂(μ₃-OH)₂ (1). The crystal structure of 1 indicates that hexametallic centers are bridged by the μ₃-alkoxo, dmea oxygens, and the μ₂-dicarboxylato oxygen atoms of pivalate ions. Furthermore, in the asymmetric...

article

1D cerium(III) coordination polymer with pivalate bridges: Synthesis, structure and magnetic properties

Muhammad Nadeem Akhtar, Muhammad Mateen, Masaaki Sadakiyo, Muhammad Farooq Warsi, more

Journal of Molecular Structure > 2017 > 1141 > C > 170-175

In the present work, synthesis, characterization, and properties of a new 1D-polymeric chain of [Ce(piv)₃(MeOH)₂]_n (1D-Ce) are described. This polymeric structure was synthesized via reaction of Ce(NO₃)₃·6H₂O with pivalic acid in presence of triethylamine. Crystal structure consists of cerium coordinated to eight oxygen atoms from five pivalate and two methanol moieties. Magnetic studies on the complex...

article

Biochemical Evaluation of Copper Compounds Derived from O- and N-/O- Donor Ligands

Muhammad Nadeem Akhtar, Muhammad Shahid, Masaaki Sadakiyo, Muhammad Ikram, more

Pharmaceutical Chemistry Journal > 2017 > 51 > 4 > 272-276

Compounds [Cu^II₂(benz)₄(Hbenz)₂] (1) and [Cu^II(ppa)₂(H₂O)₂]_n (2), where benz = benzoate and ppa = 3-pyridinepropionic acid, were synthesized and studied for their 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and the inhibition of enzymes such as acetylcholinesterase (AChE), butyrylcholinesterase (BChE), lipoxygenase (LOX), urease, chymotrypsin and α-glucosidase. The synthesized...

article

An azide-bridged copper(II) 1D-chain with ferromagnetic interactions: synthesis, structure and magnetic studies

Muhammad Nadeem Akhtar, Sadia Tahir, Masaaki Sadakiyo, Muhammad Farooq Warsi, more

Transition Metal Chemistry > 2017 > 42 > 7 > 635-641

A coordination polymer of formula [Cu(μ_1,3-N₃)₂(imH)₂]_n (1) has been synthesized by reaction of Cu(NO₃)₂ with imidazole and sodium azide in CH₃OH/CH₃CN. The complex was characterized by FTIR, elemental analysis, powder diffraction, thermogravimetric analysis, magnetic measurements, and single-crystal X-ray diffraction. The X-ray crystal structure shows that the Cu(II) centers have a distorted octahedral...

article

Synthesis and cytotoxic effects of (E)-3-(2,3-dimethoxyphenyl)-1-(5-methylfuran-2-yl) prop-2-en-1-one in MDA-MB231 and MCF-7 breast cancer cell lines

Muhammad Nadeem Akhtar, Landa Zeenelabdin Ali Salim, Swee Keong Yeap, Nadiah Abu, more

Phytochemistry Letters > 2017 > 19 > C > 145-150

A chalcone derivative, (E)-3-(2,3-dimethoxyphenyl)-1-(5-methylfuran-2-yl)-prop-2-en-1-one (DMMF) was synthesized and evaluated against various cancerous cell lines including colon adenocarcinoma (HT-29), myloplasticleukemia (HL60), breast cancer (MCF-7 and MDA-MB231), normal hepatic cell (WRL-68) and normal breast cell (MCF-10A). The structure of DMMF was determined by EI-MS, ¹H NMR and single X-ray...

article

Cardamonin (2′,4′-dihydroxy-6′-methoxychalcone) isolated from Boesenbergia rotunda (L.) Mansf. inhibits CFA-induced rheumatoid arthritis in rats

Fui-Ling Voon, Mohd Roslan Sulaiman, Muhammad Nadeem Akhtar, Mohamad Fauzi Idris, more

European Journal of Pharmacology > 2017 > 794 > C > 127-134

Boesenbergia rotunda (L.) Mansf. had been traditionally used as herbs to treat pain and rheumatism. Cardamonin (2′,4′-dihydroxy-6′-methoxychalcone) is a compound isolated from Boesenbergia rotunda (L.) Mansf.. Previous study had shown the potential of cardamonin in inhibiting the release of pro-inflammatory cytokines such as tumour necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and interleukin-6...

article

Fatty acids characterization, oxidative perspectives and consumer acceptability of oil extracted from pre-treated chia (Salvia hispanica L.) seeds

Muhammad Imran, Muhammad Nadeem, Muhammad Faisal Manzoor, Amna Javed, more

Lipids in Health and Disease > 2016 > 15 > 1 > 1-13

Background Chia (Salvia hispanica L.) seeds have been described as a good source of lipids, protein, dietary fiber, polyphenolic compounds and omega-3 polyunsaturated fatty acids. The consumption of chia seed oil helps to improve biological markers related to metabolic syndrome diseases. The oil yield and fatty acids composition of chia oil is affected by several factors such as pre-treatment method...

article

Synthesis and characterization of a mixed-valent Mn₁₁–La₂ aggregate with benzoate

Muhammad Nadeem Akhtar, Yanhua Lan, Valeriu Mereacre, Murad A. AlDamen, more

Monatshefte für Chemie - Chemical Monthly > 2017 > 148 > 5 > 887-891

A new mixed-valent Mn–Ln complex with an Mn ₉^III Mn ₂^II La₂ core $$ [{\text{Mn}}_{9}^{\text{III}} {\text{Mn}}_{2}^{\text{II}} {\text{La}}_{ 2} (\mu_{ 4} {-}{\text{O}})_{7} (\mu_{ 3} {-}{\text{O}})(\mu_{ 3} {-}{\text{OH}})_{ 2} ({\text{benzoate}})_{ 1 8} ({\text{NO}}_{3} )({\text{MeCN}})] $$ [ Mn 9 III Mn 2 II La 2 ( μ 4 - O ) 7 ( μ 3 - O ) ( μ 3 - OH ) 2 ( benzoate...

article

Synthesis, crystal structure and biological activity of a cobalt(II) complex of N,N,N′,N′-tetrakis(2-hydroxypropyl) ethylenediamine

Muhammad Nadeem Akhtar, William T. A. Harrison, Muhammad Shahid, Islam-Ullah Khan, more

Transition Metal Chemistry > 2016 > 41 > 3 > 325-330

The synthesis, crystal structure and biological properties of [Co(edtp)Cl)]·NO₃·H₂O are described, where edtp is N,N,N′,N′-tetrakis(2-hydroxypropyl) ethylenediamine. The Co²⁺ ion is coordinated by the N,N′,O,O′,O″-pentadentate edtp ligand and a chloride to generate a distorted CoClN₂O₃ octahedron. The complex exhibits moderate antithrombolytic activity (38 % screened by hemolytic assay) against clots...

article

Design and synthesis of new barbituric- and thiobarbituric acid derivatives as potent urease inhibitors: Structure activity relationship and molecular modeling studies

Abdul Rauf, Sohail Shahzad, Marek Bajda, Muhammad Yar, more

Bioorganic & Medicinal Chemistry > 2015 > 23 > 17 > 6049-6058

In this study 36 new compounds were synthesized by condensing barbituric acid or thiobarbituric acid and respective anilines (bearing different substituents) in the presence of triethyl orthoformate in good yields. In vitro urease inhibition studies against jack bean urease revealed that barbituric acid derived compounds (1–9 and 19–27) were found to exhibit low to moderate activity however thiobarbituric...

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Search results for: Muhammad Nadeem Akhtar

Heterometallic decanuclear [Fe₆–Ln₄] coordination clusters with enzymatic mimic activity: Synthesis, structures, magnetic properties, and evaluation of catecholase activity

Comparing the application of conventional and supercritical CO₂ extracts of green tea; storage stability and sensory acceptance of coriander sauce

The role of hydrogen bonding in π···π stacking interactions in Ni(II) complex derived from triethanolamine: synthesis, crystal structure, antimicrobial, and DFT studies

Supertetrahedral T2 clusters in 3d-4f {Fe4Ln6}: Synthesis, crystal structure, magnetic and photoluminescent properties

Enhancing single-molecule magnet behavior of linear Co^II-Dy^IIICo^II complex by introducing bulky diamagnetic moiety

Facile synthesis of N- (4-bromophenyl)-1- (3-bromothiophen-2-yl)methanimine derivatives via Suzuki cross-coupling reaction: their characterization and DFT studies

Palladium(0) catalyzed Suzuki cross-coupling reaction of 2,5-dibromo-3-methylthiophene: selectivity, characterization, DFT studies and their biological evaluations

Optimized production and advanced assessment of biodiesel: A review

Correction to: Biological Evaluation of Copper Complexes Derived from O- and N-, O-Donor Ligands

Design, synthesis and cytotoxic effects of curcuminoids on HeLa, K562, MCF-7 and MDA-MB-231 cancer cell lines

Alkoxo- and carboxylato-bridged hexanuclear copper(II) complex: Synthesis, structure and magnetic properties

1D cerium(III) coordination polymer with pivalate bridges: Synthesis, structure and magnetic properties

Biochemical Evaluation of Copper Compounds Derived from O- and N-/O- Donor Ligands

An azide-bridged copper(II) 1D-chain with ferromagnetic interactions: synthesis, structure and magnetic studies

Synthesis and cytotoxic effects of (E)-3-(2,3-dimethoxyphenyl)-1-(5-methylfuran-2-yl) prop-2-en-1-one in MDA-MB231 and MCF-7 breast cancer cell lines

Cardamonin (2′,4′-dihydroxy-6′-methoxychalcone) isolated from Boesenbergia rotunda (L.) Mansf. inhibits CFA-induced rheumatoid arthritis in rats

Fatty acids characterization, oxidative perspectives and consumer acceptability of oil extracted from pre-treated chia (Salvia hispanica L.) seeds

Synthesis and characterization of a mixed-valent Mn₁₁–La₂ aggregate with benzoate

Synthesis, crystal structure and biological activity of a cobalt(II) complex of N,N,N′,N′-tetrakis(2-hydroxypropyl) ethylenediamine

Design and synthesis of new barbituric- and thiobarbituric acid derivatives as potent urease inhibitors: Structure activity relationship and molecular modeling studies

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