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Journal articles on the topic '9-Fluorenone'

Author: Grafiati

Published: 3 June 2025

Last updated: 1 August 2025

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1

Wilson, Nancy K. "Intramolecular motion and reorientational barriers in 9-fluorenone, 4-methyl-9-fluorenone and 4,5-dimethyl-9-fluorenone." Magnetic Resonance in Chemistry 23, no. 1 (1985): 12–15. http://dx.doi.org/10.1002/mrc.1260230106.

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2

Journal, Baghdad Science. "Synthesis and Characterization of 1,3,4-Oxadiazoles Derived From 9-Fluorenone." Baghdad Science Journal 10, no. 2 (2013): 449–61. http://dx.doi.org/10.21123/bsj.10.2.449-461.

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In the present work, 9-fluorenone-2-carboxylic acid methyl ester (1) was prepared from 9-fluorenone-2-carboxylic acid and then converted into the acid hydrazide (2). Compound (2), is the key intermediate for the synthesis of several series of new compounds such as substituted 1,3,4-oxadiazole derivatives (3-6) were synthesized from the condensation of different substituted benzoic acids with compound (2) using POCl3 as condensing agent. Treatment of compound (2) with formic acid gave the N-formyl hydrazide (7), which upon refluxing with phosphorous pentoxide in benzene yielded the correspondin

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3

Dawood, Rafid Saad. "Synthesis and Characterization of 1,3,4-Oxadiazoles Derived From 9-Fluorenone." Baghdad Science Journal 10, no. 2 (2013): 449–61. http://dx.doi.org/10.21123/bsj.2013.10.2.449-461.

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In the present work, 9-fluorenone-2-carboxylic acid methyl ester (1) was prepared from 9-fluorenone-2-carboxylic acid and then converted into the acid hydrazide (2). Compound (2), is the key intermediate for the synthesis of several series of new compounds such as substituted 1,3,4-oxadiazole derivatives (3-6) were synthesized from the condensation of different substituted benzoic acids with compound (2) using POCl3 as condensing agent. Treatment of compound (2) with formic acid gave the N-formyl hydrazide (7), which upon refluxing with phosphorous pentoxide in benzene yielded the correspondin

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4

Casellas, Mercè, Magdalena Grifoll, Jordi Sabaté, and Anna Maria Solanas. "Isolation and characterization of a 9-fluorenone-degrading bacterial strain and its role in synergistic degradation of fluorene by a consortium." Canadian Journal of Microbiology 44, no. 8 (1998): 734–42. http://dx.doi.org/10.1139/w98-066.

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Pseudomonas mendocina MC2, able to use 9-fluorenone but not fluorene as its sole source of carbon and energy, was isolated. Identification of metabolites in growth media and washed cell suspensions indicated that strain MC2 metabolizes 9-fluorenone via angular dioxygenation of the ketone, to give 1,1a-dihydroxy-1-hydro-9-fluorenone, followed by the opening of the five-membered ring and further degradation of the resulting biphenyl derivative by reactions akin to those of biphenyl metabolism, which produce phthalate as an intermediate. The aim of this research was to study the biodegradation of

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5

Habe, Hiroshi, Jin-Sung Chung, Hiroyuki Kato, et al. "Characterization of the Upper Pathway Genes for Fluorene Metabolism in Terrabacter sp. Strain DBF63." Journal of Bacteriology 186, no. 17 (2004): 5938–44. http://dx.doi.org/10.1128/jb.186.17.5938-5944.2004.

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ABSTRACT Genes involved in the degradation of fluorene to phthalate were characterized in the fluorene degrader Terrabacter sp. strain DBF63. The initial attack on both fluorene and 9-fluorenone was catalyzed by DbfA to yield 9-fluorenol and 1,1a-dihydroxy-1-hydro-9-fluorenone, respectively. The FlnB protein exhibited activities against both 9-fluorenol and 1,1a-dihydroxy-1-hydro-9-fluorenone to produce 9-fluorenone and 2′-carboxy-2,3-dihydroxybiphenyl, respectively. FlnD is a heteromeric protein encoded by flnD1 and ORF16, being a member of the class III two-subunit extradiol dioxygenase. Fln

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6

Niu, Yue, Ling Zhou, Huiqi Wang, et al. "Enhancing the Water Solubility of 9-Fluorenone Using Cyclodextrin Inclusions: A Green Approach for the Environmental Remediation of OPAHs." Crystals 13, no. 5 (2023): 775. http://dx.doi.org/10.3390/cryst13050775.

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Oxygenated polycyclic aromatic hydrocarbons (OPAHs) are toxic and carcinogenic compounds widely present in the natural environment, posing a serious threat to the environment and human health. However, the removal of OPAHs is mainly hindered by their low water solubility. Cyclodextrins (CDs) are frequently used to form inclusion complexes (ICs) with hydrophobic molecules to improve their solubility. In this study, we investigated the solubility enhancement ability of different CDs on 9-fluorenone, a common OPAH, through phase solubility experiments. We successfully prepared three solid ICs of

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7

Cihaner, Atilla, Seha Tirkeş, and Ahmet M. Önal. "Electrochemical polymerization of 9-fluorenone." Journal of Electroanalytical Chemistry 568 (July 2004): 151–56. http://dx.doi.org/10.1016/j.jelechem.2004.01.027.

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8

Luo, Yan, Chun-Hua Chen, Jin-Qi Zhang, Cui Liang, and Dong-Liang Mo. "Synthesis of Spirofluorenyl-1,2,4-oxadiazinan-5-ones through Metal-Free [3+3] Cycloaddition of N-Vinyl Fluorenone Nitrones with Aza-oxyallyl Cations." Synthesis 52, no. 03 (2019): 424–32. http://dx.doi.org/10.1055/s-0039-1691490.

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Spirofluorenyl-1,2,4-oxadiazinan-5-ones are prepared in good to excellent yields through metal-free [3+3] cycloaddition of N-vinyl fluorenone nitrones and aza-oxyallyl cations under mild reaction conditions. Detailed studies reveal that N-vinyl fluorenone nitrones show greater reactivity in [3+3] cycloadditions with aza-oxyallyl cations compared to N-alkyl/aryl fluorenone nitrones. The spirofluorenyl-1,2,4-oxadiazinan-5-ones are easily prepared on gram scale. The present method features mild reaction conditions, broad substrate scope, good functional group tolerance and efficient [3+3] cycload

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9

INOUE, Tomomi, Tetsuya TASAKA, Reiji MARUYAMA, Yasuteru SUMITA, Shin ONO, and Masami INOUE. "Bacterial Reduction of 9-Fluorenone to 9-Hydroxyfluorene." Bioscience, Biotechnology, and Biochemistry 62, no. 4 (1998): 814–15. http://dx.doi.org/10.1271/bbb.62.814.

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10

Chetkina, L. A., O. V. Semidetko, V. K. Belsky, A. N. Sobolev, and A. M. Andrievsky. "Structure of 2,4,5,7-tetranitro-9-fluorenone." Acta Crystallographica Section C Crystal Structure Communications 43, no. 5 (1987): 931–33. http://dx.doi.org/10.1107/s0108270187093533.

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11

Lu, Z. L., B. Z. Shan, C. Y. Duan, et al. "4,5-Diaza-9-fluorenone Isonicotinoylhydrazone Monohydrate." Acta Crystallographica Section C Crystal Structure Communications 52, no. 7 (1996): 1720–22. http://dx.doi.org/10.1107/s0108270196002144.

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12

Dong, Meiqiu, Kai Miao, Yi Hu, et al. "Cooperating dipole–dipole and van der Waals interactions driven 2D self-assembly of fluorenone derivatives: ester chain length effect." Physical Chemistry Chemical Physics 19, no. 46 (2017): 31113–20. http://dx.doi.org/10.1039/c7cp06462d.

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Two-dimensional supramolecular assemblies of a series of 2,7-bis(10-n-alkoxycarbonyl-decyloxy)-9-fluorenone derivatives (BAF-Cn, n = 1, 3–6) consisting of polar fluorenone moieties and ester alkoxy chains were investigated by scanning tunneling microscopy on highly oriented pyrolytic graphite surfaces.

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13

Baughman, R. G. "The structure of 2,4,5,7-tetranitro-9-fluorenone." Acta Crystallographica Section C Crystal Structure Communications 43, no. 5 (1987): 933–36. http://dx.doi.org/10.1107/s0108270187093521.

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14

Donà, Edoardo, and Aleksandra Lobnik. "Chlorpyrifos Detection Based on 9-Fluorenone Oxime." Chemosensors 13, no. 5 (2025): 170. https://doi.org/10.3390/chemosensors13050170.

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Chlorpyrifos is one of the most toxic organophosphate pesticides, prompting its ban in Europe in 2020. Consequently, developing a detection method that is both selective and sensitive is essential for protecting human health and the environment. In this study, we report for the first time a fluorescent probe based on an oxime for the direct detection of chlorpyrifos. 9-fluorenone oxime, upon deprotonation with a phosphazene base, undergoes a nucleophilic attack on chlorpyrifos, resulting in a significant alteration of its fluorescence properties. Following careful optimization, the method demo

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15

Pitts, Cody Ross, Michelle Sheanne Bloom, Desta Doro Bume, Qinze Arthur Zhang, and Thomas Lectka. "Unstrained C–C bond activation and directed fluorination through photocatalytically-generated radical cations." Chemical Science 6, no. 9 (2015): 5225–29. http://dx.doi.org/10.1039/c5sc01973g.

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16

Benya, Donna K., Jorge F. de Freitas, Guy Crundwell, and Neil M. Glagovich. "N,N′-Bis(9H-fluoren-9-ylidene)benzene-1,4-diamine." Acta Crystallographica Section E Structure Reports Online 62, no. 4 (2006): o1639—o1640. http://dx.doi.org/10.1107/s1600536806010786.

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17

Teci, Matthieu, Eric Brenner, Dominique Matt, Christophe Gourlaouen, and Loïc Toupet. "N-Alkylfluorenyl-substituted N-heterocyclic carbenes as bimodal pincers." Dalton Transactions 44, no. 19 (2015): 9260–68. http://dx.doi.org/10.1039/c5dt00980d.

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Two N-heterocyclic carbene precursors having their nitrogen atoms substituted by the expanded 9-ethyl-9-fluorenyl group, namely imidazolinium chloride 6 and imidazolium chloride 7, have been synthesized in high yields from fluorenone (1).

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18

Uckert, Frank, Sepas Setayesh, and Klaus Müllen. "A Precursor Route to 2,7-Poly(9-fluorenone)." Macromolecules 32, no. 14 (1999): 4519–24. http://dx.doi.org/10.1021/ma990157f.

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19

Li, Zhuomin, and et al. "Crystal structure of 1,4-diaminobenzene 9-fluorenone, C16H12NO." Zeitschrift für Kristallographie - New Crystal Structures 228, no. 1 (2013): 85–86. http://dx.doi.org/10.1524/ncrs.2013.0056.

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20

Khobrekar, Pritesh, and Sandesh Bugde. "Recent advances of 9-fluorenone in photoredox catalysis." Molecular Catalysis 582 (July 2025): 115169. https://doi.org/10.1016/j.mcat.2025.115169.

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21

Natansohn, Almeria. "CPMAS carbon-13 NMR spectra of poly(N-vinylcarbazole) complexes with 2,4,7-trinitro-9-fluorenone and 2,4,5,7-tetranitro-9-fluorenone." Macromolecules 24, no. 7 (1991): 1662–69. http://dx.doi.org/10.1021/ma00007a032.

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22

Lei, Yan, Limei Yu, Maochang Shen, Shikang Luo, and Zhanxian Gao. "Condensation of 9-fluorenone and phenol using an ionic liquid and a mercapto compound synergistic catalyst." New Journal of Chemistry 43, no. 39 (2019): 15700–15705. http://dx.doi.org/10.1039/c9nj02581b.

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23

Reche, Irene, Iluminada Gallardo, and Gonzalo Guirado. "The role of cations in the reduction of 9-fluorenone in bis(trifluoromethylsulfonyl)imide room temperature ionic liquids." New J. Chem. 38, no. 10 (2014): 5030–36. http://dx.doi.org/10.1039/c4nj01200c.

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24

Jones, C. Susana. "A Synthesis of 9-Fluorenol: Sodium Borohydride Reduction of 9-Fluorenone." Journal of Chemical Education 71, no. 10 (1994): A252. http://dx.doi.org/10.1021/ed071pa252.1.

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25

Tyutyulkov, N., I. Kavrakova, P. Nikolov, and F. Dietz. "9-Aminofluorenium Cations: A New Group of anti-Aromatic Molecules." Zeitschrift für Naturforschung B 44, no. 11 (1989): 1451–52. http://dx.doi.org/10.1515/znb-1989-1121.

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Quantum-chemical and spectral studies on the protonated form of fluorenone-anil show that this compound has anti-aromatic character. Its real structure should be considered as: 9-amino derivative of the anti-aromatic fluorenium cation.

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26

Wei, Jialun, Limei Yu, Lei Yan, Wei Bai, Xinxin Lu, and Zhanxian Gao. "Synthesis of 9,9-bis(4-hydroxyphenyl) fluorene catalyzed by bifunctional ionic liquids." RSC Advances 11, no. 52 (2021): 32559–64. http://dx.doi.org/10.1039/d1ra05967j.

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A series of bifunctional ionic liquids (BFILs) containing sulfonic acid (–SO3H) and sulfhydryl groups (–SH) were synthesized, and their catalytic performance in the condensation reaction of 9-fluorenone and phenol were studied.

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27

Rekha, Nagwanshi, Singh Solankia Jeeven, Bageriab Sandhya, and Jain Shubha. "PHOTOLYSIS OF FLUORENE AND 9-FLUORENONE A TOXIC ENVIRONMENTAL CONTAMINANT: STUDIES IN THE EFFECT OF SOLVENT AND INTENSITY OF THE SOURCE." International Journal of Engineering Technologies and Management Research 4, no. 12 : SE (2017): 55–59. https://doi.org/10.5281/zenodo.1163001.

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<strong><em>Polycyclic aromatic hydrocarbons (PAHs) are a class of genotoxic environmental contaminants and are always exposed to solar radiations. Fluorenes are important PAHs widely distributed in nature and hence the studies in the effect of light on them are of ulmost significance. Therefore in this paper, we have studied the photo irradiations of fluorene (1) and 9-fluorenone (2) with UV light in different solvents, which results in the formation of different products.</em></strong>

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28

Chetkina, L. A., and V. K. Belsky. "X-ray diffraction study of fluorene, 9-fluorenone, and 9-dicyanomethylenefluorene derivatives." Crystallography Reports 58, no. 1 (2013): 26–48. http://dx.doi.org/10.1134/s1063774512040049.

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29

Wu, Xiao Y., Guo W. Qin, Da J. Fan, and Ren S. Xu. "1-hydroxy-2,5,8-trimethyl-9-fluorenone from Tripterygium wilfordii." Phytochemistry 36, no. 2 (1994): 477–79. http://dx.doi.org/10.1016/s0031-9422(00)97099-7.

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30

Nayak, Manoj K., and S. K. Dogra. "Photophysics of 1-hydroxy- and 1-methoxy-9-fluorenone." Journal of Photochemistry and Photobiology A: Chemistry 169, no. 3 (2005): 299–307. http://dx.doi.org/10.1016/j.jphotochem.2004.07.011.

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31

Hosseini, Hajar, and Mohammad Bayat. "Synthesis of 5-amino-N′-(9H-fluoren-9-ylidene)-8-nitro-7-aryl-1,2,3,7-tetrahydroimidazo[1,2-a]pyridine-6-carbohydrazide derivatives based on heterocyclic ketene aminals." RSC Advances 8, no. 72 (2018): 41218–25. http://dx.doi.org/10.1039/c8ra09308c.

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A new class of tetrahydroimidazo[1,2-a]pyridine derivatives has been successfully prepared via a five-component domino reaction using cyanoacetohydrazide, 9-fluorenone, aromatic aldehydes, 1,1-bis(methylthio)-2-nitroethene and ethylenediamine in ethanol at reflux.

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32

Schaefer, Ted, James Peeling, and Glenn H. Penner. "The mechanisms of long-range 13C,19F and 19F,19F coupling constants in derivatives of biphenyl and fluorene. Differential isotope shifts." Canadian Journal of Chemistry 64, no. 11 (1986): 2162–67. http://dx.doi.org/10.1139/v86-355.

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13C,19F and 19F,19F nuclear spin–spin coupling constants over n formal bonds, n = 1–9, are reported for 4-fluorobiphenyl, 4,4′-difluorobiphenyl, 4,4′-difluoro-2,2′,6,6′-tetramethylbiphenyl, 2,7-difluorofluorene, 2-fluoro-9-fluorenone, and 2,7-difluoro-9-fluorenone in acetone solutions. The signs of many of the coupling constants are deduced from second-order spectral phenomena caused by differential 13C isotope effects on the I9F nmr chemical shifts. Theoretical potentials, based on geometry-optimized STO 3G MO computations for 4-fluorobiphenyl and 4,4′-difluorobiphenyl, yield expectation valu

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33

Ziółkowska, Aleksandra, Natalia Szynkiewicz, Jerzy Pikies, and Łukasz Ponikiewski. "Synthesis of compounds with C–P–P and CP–P bond systems based on the phospha-Wittig reaction." Dalton Transactions 49, no. 39 (2020): 13635–46. http://dx.doi.org/10.1039/d0dt02728f.

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This work presents the reactivity of [<sup>Me</sup>NacNacTi(Cl){η<sup>2</sup>-P(SiMe<sub>3</sub>)–PtBu<sub>2</sub>}] towards ketones such as benzophenone, 9-fluorenone, acetophenone, cyclopentanone, cyclohexanone and cycloheptanone based on the phospha-Wittig reaction.

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34

Siemeling, Ulrich, Imke Scheppelmann, Beate Neumann, Hans-Georg Stammler, and Wolfgang W. Schoeller. "Cyclopentadienone-like Behavior of Fluorenone and 4,5-Diazafluoren-9-one." Organometallics 23, no. 4 (2004): 626–28. http://dx.doi.org/10.1021/om030615f.

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35

Gerbich, Thiemo, Jörg Herterich, Juliane Köhler, and Ingo Fischer. "Time-Domain Study of the S3 State of 9-Fluorenone." Journal of Physical Chemistry A 118, no. 8 (2014): 1397–402. http://dx.doi.org/10.1021/jp412031f.

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36

Bucher, Goetz, J. C. Scaiano, R. Sinta, G. Barclay, and J. Cameron. "Laser Flash Photolysis of Carbamates Derived from 9-Fluorenone Oxime." Journal of the American Chemical Society 117, no. 13 (1995): 3848–55. http://dx.doi.org/10.1021/ja00118a021.

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37

Gao, Hang, Shuxia Wang, Bingchao Qiang, Sixuan Wang та Huabei Zhang. "Radioiodinated 9-fluorenone derivatives for imaging α7-nicotinic acetylcholine receptors". MedChemComm 10, № 12 (2019): 2102–10. http://dx.doi.org/10.1039/c9md00415g.

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38

Stovall, Dawn M., William E. Acree, and Michael H. Abraham. "Solubility of 9-fluorenone, thianthrene and xanthene in organic solvents." Fluid Phase Equilibria 232, no. 1-2 (2005): 113–21. http://dx.doi.org/10.1016/j.fluid.2005.02.016.

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39

Minacheva, L. Kh, V. S. Sergienko, S. B. Strashnova, et al. "Crystal structure and spectral characteristics of 2,4,7-trinitro-9-fluorenone." Crystallography Reports 50, no. 1 (2005): 72–77. http://dx.doi.org/10.1134/1.1857248.

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40

Zhuge, Yuexia, Chunhong Zheng, Guanming Liao, and Shouzhi Pu. "Structure and photochromic properties of a novel diarylethene containing a 9-fluorenone hydrazone Schiff base moiety." Journal of Chemical Research 44, no. 3-4 (2019): 137–41. http://dx.doi.org/10.1177/1747519819891029.

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A novel diarylethene containing a 9-fluorenone hydrazone Schiff base moiety is designed and synthesized. The structure is characterized by single-crystal diffraction analysis and it shows excellent photochromism in the single crystalline phase. Moreover, the diarylethene product shows relatively high fluorescence modulation efficiency and good fatigue resistance.

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41

Fionov, A. V. "Paramagnetic complexes of 9, 10-anthraquinone and 9-fluorenone on the metal oxide surface." Russian Chemical Bulletin 58, no. 3 (2009): 538–50. http://dx.doi.org/10.1007/s11172-009-0053-z.

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42

Monte, Manuel J. S., Rafael Notario, Maria M. G. Calvinho, et al. "Experimental and Computational Study of the Thermodynamic Properties of 9-Fluorenone and 9-Fluorenol." Journal of Chemical & Engineering Data 57, no. 9 (2012): 2486–96. http://dx.doi.org/10.1021/je300584m.

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43

Chetkina, L. A., and V. K. Belsky. "ChemInform Abstract: X-Ray Diffraction Study of Fluorene, 9-Fluorenone, and 9-Dicyanomethylenefluorene Derivatives." ChemInform 44, no. 41 (2013): no. http://dx.doi.org/10.1002/chin.201341279.

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44

Baldwin, S. L., and R. G. Baughman. "Structure of the charge-transfer complexes 2,4,5,7-tetranitro-9-fluorenone–1-ethylnaphthalene (1/1) (I) and 2,4,5,7-tetranitro-9-fluorenone–3,6-dimethylphenanthrene (1/1) (II)." Acta Crystallographica Section C Crystal Structure Communications 49, no. 10 (1993): 1840–44. http://dx.doi.org/10.1107/s0108270193002446.

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45

O’Keefe, P. W., O. Ekabo, E. Braun-Howland, D. Swarr, and B. Stockholm. "Microbial Reduction of 9-Fluorenone to 9-Hydroxyfluorene in Carbon-Filtered Water: A Confounding Factor in an Aquatic Bioassay of 9-Fluorenone with Larvae of the Midge, Chironomus tentans (Fabr.)." Bulletin of Environmental Contamination and Toxicology 75, no. 6 (2005): 1060–66. http://dx.doi.org/10.1007/s00128-005-0857-y.

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46

Cheek, G. T. "Electrochemical Studies of 9-Fluorenone Complexation by Aluminum in Ionic Liquids." ECS Transactions 58, no. 34 (2014): 1–5. http://dx.doi.org/10.1149/05834.0001ecst.

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47

Yang, Hsin-Sheng, and Chi-Ming Wang. "Syntheses and Electrical Conductivities of 9-Fluorenone-Iodine-Alkali Iodide Complexes." Journal of the Chinese Chemical Society 34, no. 4 (1987): 301–7. http://dx.doi.org/10.1002/jccs.198700046.

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48

Muthuppalani, M., Ahmed Al Otaibi, S. Balasubramaniyan, et al. "Synthesis, Characterization and Bio-Potential Activities of Co(II) and Ni(II) Complexes with O and N Donor Mixed Ligands." Crystals 12, no. 3 (2022): 326. http://dx.doi.org/10.3390/cryst12030326.

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The synthesis and characterization of Co(II) and Ni(II) mixed ligand complexes are derived from isoniazid, 9-fluorenoneandoxalate. The metal complexes were characterized on the basis of elemental analysis, IR, UV-visible, CV, PXRD, and molar conductance analytical data, viz., all the metal complexes were suggested in an octahedral geometry, respectively. The mixed ligand complexes are formed in the 1:1:2:1 (M:L1:L2:L3) ratios, as found from the elemental analyses, and originate to have the formula [M(L1)(L2)2(L3)]. Where M = Co(II), Ni(II), L1 = isoniazid, L2 = 9-fluorenone, and L3 = oxalate.

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49

Nagwanshi, Rekha, Dr Jeeven Singh Solanki, Sandhya Bageriab, and Shubha Jain. "PHOTOLYSIS OF FLUORENE AND 9-FLUORENONE A TOXIC ENVIRONMENTAL CONTAMINANT: STUDIES IN THE EFFECT OF SOLVENT AND INTENSITY OF THE SOURCE." International Journal of Engineering Technologies and Management Research 4, no. 12 (2020): 55–59. http://dx.doi.org/10.29121/ijetmr.v4.i12.2017.591.

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Polycyclic aromatic hydrocarbons (PAHs) are a class of genotoxic environmentalcontaminants and are always exposed to solar radiations. Fluorenes are important PAHswidely distributed in nature and hence the studies in the effect of light on them are of ulmostsignificance. Therefore in this paper, we have studied the photo irradiations of fluorene (1)and 9-fluorenone (2) with UV light in different solvents, which results in the formation ofdifferent products.

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50

Li, Shanqing, and Qingzhu Zhang. "Mechanistic Studies on the Dibenzofuran Formation from Phenanthrene, Fluorene and 9–Fluorenone." International Journal of Molecular Sciences 16, no. 12 (2015): 5271–84. http://dx.doi.org/10.3390/ijms16035271.

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