Academic literature on the topic 'Metal Complexing Ligand'

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Journal articles on the topic "Metal Complexing Ligand"

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El-Gahami, Mohamed A., and Maher F. El-Zohry. "Complexing Ability of Some 2-Spirothiazolid-4-one Derivatives." Zeitschrift für Naturforschung B 49, no. 4 (1994): 551–55. http://dx.doi.org/10.1515/znb-1994-0418.

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The complexes of some 2-spirothiazolid-4-one derivatives have been prepared with Cu(II), N i(II), C o(II) and Cd(II) salts. The complexes all have a metal to ligand ratios of 1:1 or 1:2 and are all believed to have tetrahedral structures with chelating ligands. Their structures are suggested on the basis of analysis, X-ray diffraction techniques, spectral (UV-VIS, IR, 1H NMR), and thermal decomposition as well as conductivity measurements. The ligands are coordinated to the metal ions as monovalent bidentate ligands through the OCO groups. Electrical conductivity studies indicated that these c
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Wang, Jun, Peng Zhang, Shuai Chen, and Cui Qin Li. "Synthesis and Characterization of Cu(II), Zn(II) Dendritic Metal Complexes." Advanced Materials Research 160-162 (November 2010): 529–35. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.529.

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A new kind of dendritic-salicylaldehydeimine ligand was synthesized with 1.0G polyamidoamine and salicylaldehyde through schiff reaction, and further formed two kinds of dendritic metal complexes by complexing Cu and Zn. The dendritic-salicylaldehydeimine ligand and its metal complexes were characterized by elemental analysis, IR, NMR and UV. The results indicate that two kinds of dendritic metal complexes with stable structure have been synthesized by complexing Cu and Zn, the yield were 88.2% and 65.2% respectively; Intra-molecular hydrogen bond between the hydroxyl H atom of ph-OH and the N
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Hussein, Mohammed Bahreldin, Muna Mahdi Mohammed, and Yousif Sulfab. "Synthesis, Characterization And Antimicrobial Study of Pd(II) and Pt(II) complexes of 4-methyl-5-Imidazolecarboxaldehyde Thiosemicarbazone." Scholars International Journal of Chemistry and Material Sciences 6, no. 1 (2023): 1–17. http://dx.doi.org/10.36348/sijcms.2023.v06i01.001.

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Schiff bases are regarded as “privileged ligands” due to their capability to form complexes with a wide range of transition metal ions yielding stable and intensely colored metal complexes. In this study, equimolar amounts of 4-methyl-5-imidazolecarboxaldehyde and thiosemicarbazide were combined and the Schiff base 4-methyl-5-imidazolecarboxaldehyde thiosemicarbazone was prepared as a new bidentate complexing agent. The synthesized ligand was reacted with palladium (II) and platinum (II) ions yielding air-stable complexes. For characterization purpose, mass spectra and x-ray analysis of the li
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Limaye, Sudhir N., and Mahesh C. Saxena. "Relative complexing tendencies of O—O, O—N, and O—S donor (secondary) ligands in some lanthanide–EDTA mixed-ligand complexes." Canadian Journal of Chemistry 64, no. 5 (1986): 865–70. http://dx.doi.org/10.1139/v86-143.

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Metal–ligand association constants of 1:1 binary (ML) and 1:1:1 ternary (MAL) complexes of the type [Formula: see text] (where M = La3+, Ce3+, Pr3+, Nd3+, or Sm3+; A = primary ligand = EDTA; L = secondary ligand = O—O, O—N, O—S donor aliphatic or aromatic ligand) have been determined potentiometrically by the Irving–Rossotti titration technique at ionic strength 0.2 (mol dm−3 NaClO4) and 25 °C. Differences between log KML and log KMAL are negative; this may be chiefly due to electrostatic repulsion between the primary binary complex and the incoming secondary ligand during the formation of the
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Murray, Hollydawn, Guillaume Meunier, Constant M. G. van den Berg, Rachel R. Cave, and Dagmar B. Stengel. "Voltammetric characterisation of macroalgae-exuded organic ligands (L) in response to Cu and Zn: a source and stimuli for L." Environmental Chemistry 11, no. 2 (2014): 100. http://dx.doi.org/10.1071/en13085.

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Environmental context Identifying the source and stimuli responsible for organic ligands in seawater is crucial to understanding trace metal availability. Voltammetric techniques were employed to characterise the water chemistry of seaweed cultures exposed to low levels of Cu or Zn over 7 days. The results suggest that seaweeds are a potential source of metal complexing ligands and Cu and Zn appear to stimulate ligand production; further research is required to determine if this is applicable to macroalgae and metals outside this study. Abstract It is widely accepted that organic ligands contr
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Bagchi, Anindya, Anusree Raha, Prosenjit Mukherjee, et al. "A Statistically Validated Electrochemical (Conductometric) and Spectroscopical Study of Some Metal Ligand Complexes for Prospective Biological Action." Saudi Journal of Medical and Pharmaceutical Sciences 9, no. 02 (2023): 94–128. http://dx.doi.org/10.36348/sjmps.2023.v09i02.006.

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The present electrochemical study deals with the evaluation of a complexation process involving different metal and ligands and its physicochemical properties to find out the ligand- metal ratio of complex in solution. For the determination of complexing nature “Monovariation method” have been used to ascertain the ligand metal ratio in the complex. The stability constant of the formed complexes were calculated by conductance measurement using Modified Job’s method (Turner Anderson Method). The analysis had been carried out by using conductometric principle and the final outcome of the experim
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Výprachtický, Drahomír, Věra Cimrová, Stanislav Kukla, and Luďka Machová. "Luminescent Terbium Complexes with Polymer Ligands." Collection of Czechoslovak Chemical Communications 69, no. 2 (2004): 309–21. http://dx.doi.org/10.1135/cccc20040309.

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Alternating and statistical copolymers of 9-vinylcarbazole with diethyl fumarate (1), diethyl maleate (2), methacrylic acid (3), maleic anhydride (4), or maleic acid (5) were synthesized and characterized. These copolymers were tested as polymer ligands, that might be able to suppress the environmental vibronic quenching of a lanthanide ion and, simultaneously, to function as energy donors in the ligand-to-metal energy transfer processes. Time-resolved luminescence of a series of [Tb(III)-ligand] complexes in common and deuterated solvents revealed that the complexing properties of copolymers
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Ren, Hongji, Byron Kratochvil, and Xiwen He. "Spectrophotometric determination of free, ionized, metal ion concentrations in solution by an indicator increment method. Application to the determination of free Mg2+ with calmagite." Canadian Journal of Chemistry 73, no. 2 (1995): 296–302. http://dx.doi.org/10.1139/v95-040.

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A spectrophotometric method, called the Indicator Increment Method, is described in which varying amounts of a complexing indicator are added to a sample and the visible spectra recorded after each addition. Through multiple equilibrium calculations the free metal ion concentration, as well as total metal and total ligand concentrations, can be estimated in systems that contain a single metal ion and one ligand. The technique was tested successfully for the determination of free magnesium in the presence of NTA, phosphate, or oxalate using calmagite as indicator. The method requires the approx
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Hussein, Mohammed Bahreldin, Muna Mahdi Mohammed, Abdalla Gobara, Asha Fadllallah Wady, and Awad Salim Ibrahim Holy. "Synthesis, characterization, and antimicrobial activity of 4-imidazolecarboxaldehyde thiosemicarbazone and its Pt(II) and Pd(II) complexes." European Journal of Chemistry 12, no. 1 (2021): 56–59. http://dx.doi.org/10.5155/eurjchem.12.1.56-59.2070.

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Schiff bases are versatile ligands, synthesized via condensation of primary amines with carbonyl compounds. In this study, equimolar amounts of 4-imidazolecarboxaldehyde and thiosemicarbazide were combined and the Schiff base 4-imidazolecarboxaldehyde thiosemicarbazone was prepared as a new bidentate complexing agent. The synthesized ligand was reacted with palladium (II) and platinum (II) ions yielding air-stable complexes. For characterization purpose, infrared spectra, mass spectra, electronic spectra, thermal analysis, proton nuclear magnetic resonance and 13-carbon nuclear magnetic resona
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(Miss), Shailey Gupta, and N. Ansari M. "Complexing behavior of 2-amino-4-benzamidothiosemicarbazide towards some 3d-metals." Journal of Indian Chemical Society Vol. 80, Oct 2003 (2003): 907–8. https://doi.org/10.5281/zenodo.5839328.

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Department of Chemistry, S. D. (P. G.) College, Muzaffarnagar-251 001, India <em>Fax ; </em>91-0131-2602354 <em>Manuscript received 15 March 2002, revised 1 April 2003, accepted 13 June 2003</em> Some new complexes of Mn<sup>II</sup>, Fe<sup>lII</sup>, Co<sup>II</sup>, Ni<sup>II</sup> and Cu<sup>II</sup> have been synthesized with 2-amino-4-benzamidothiosemicarbazide. All the complexes have 1 : 2 metal-ligand ratio with non-ionic nature except the Fe<sup>III</sup> complex, which is 1 : 1 electrolyte. All are found to be paramagnetic high spin complexes with octahedral geometry involving <em>sp
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Dissertations / Theses on the topic "Metal Complexing Ligand"

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Dean, Nolan Edward. "Metal ion complexing properties of the highly preorganized ligand 1, 10-phenanthroline-2,9-dicarboxylic acid /." Electronic version (PDF), 2007. http://dl.uncw.edu/etd/2007-3/deann/nolandean.pdf.

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Melton, Darren Landon. "Metal ion complexing properties of the two-dimensional, highly preorganized ligand 1, 10-Phenanthroline-2, 9-Dicarboxylic acid /." Electronic version (PDF), 2005. http://dl.uncw.edu/etd/2005/meltond/darrenmelton.pdf.

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Hagemann, Justin Philip. "Design, synthesis and evaluation of novel, metal complexing agents." Thesis, Rhodes University, 1997. http://hdl.handle.net/10962/d1004965.

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Various chelating ligands have been designed and synthesised; these include amino-amide ligands, tetraacetic acid systems and sulfur-containing amide ligands. Difficulties in the synthesis and purification of the amino-amide ligands were largely overcome, permitting the mono acylation of ethylenediamine and the synthesis of bis(2-aminoethyl)-2-benzylpropanediamide. Novel tetraacetic acid ligands, based on the propanediamide backbone and targeted as EDTA analogues, were obtained from their methyl and benzyl esters; but the instability of the tetraacids prevented their full characterisation. Bid
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Siddons, Chynthia Janette. "Metal ion complexing properies [i.e. properties] of amide donating ligands /." Electronic version (PDF), 2004. http://dl.uncw.edu/etd/2004/siddonsc/chynthiasiddons.pdf.

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Kissel, Daniel Stephen. "Metal ion complexing properties of two dimensional sulfur ligands and their use in neurodegenerative disease." View electronic thesis (PDF), 2009. http://dl.uncw.edu/etd/2009-3/kisseld/danielkissel.pdf.

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Whitehead, Jason Roland. "Metal ion complexing and fluorescence properties of the novel hemicycle, dipyridoacridine, with computational studies on metal ion selectivity /." Electronic version (PDF), 2007. http://dl.uncw.edu/etd/2007-1/whiteheadj/jasonwhitehead.pdf.

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McDonald, F. Crisp. "The study of 8-Hydroxyquinoline-2-Carboxyllic acid and its metal ion complexing properties /." Electronic version (PDF), 2005. http://dl.uncw.edu/etd/2005/mcdonaldf/fcrispmcdonald.pdf.

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Boone, Lindsay Leighton. "The highly preorganized ligands 1,10-Phenanthroline-2,9-Dialdoxime and BIS-1, 10-Phenanthroline, and their complexing properties with metal ions /." Electronic version (PDF), 2006. http://dl.uncw.edu/etd/2006/boonel/lindsayboone.pdf.

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Chapman, Conrad Scott. "A study of sediments as a source of metals and complexing ligands." Thesis, University of Liverpool, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420747.

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Hummel, Wolfgang. "Radioactive contaminants on the subsurface : the influence of complexing ligands on trace metal speciation /." Villigen : Laboratory for Waste Management, Paul Scherrer Institute Villigen (PSI), 2007. http://e-collection.ethbib.ethz.ch/show?type=habil&nr=24.

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Books on the topic "Metal Complexing Ligand"

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Lin, Nian, and Sebastian Stepanow. Designing low-dimensional nanostructures at surfaces by supramolecular chemistry. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533046.013.10.

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This article describes the use of supramolecular chemistry to design low-dimensional nanostructures at surfaces. In particular, it discusses the design strategies of two types of low-dimensional supramolecular nanostructures: structures stabilized by hydrogen bonds and structures stabilized by metal-ligand co-ordination interactions. After providing an overview of hydrogen-bond systems such as 0D discrete clusters, 1D chains, and 2D open networks and close-packed arrays, the article considers metal-co-ordination systems. It also presents experimental results showing that both hydrogen bonds an
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Book chapters on the topic "Metal Complexing Ligand"

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Pohlmeier, A. "Metal Speciation, Chelation and Complexing Ligands in Plants." In Heavy Metal Stress in Plants. Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-07743-6_2.

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Pohlmeier, A. "Metal Speciation, Chelation and Complexing Ligands in Plants." In Heavy Metal Stress in Plants. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-662-07745-0_2.

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Sergeevna Ageeva, Liliya, Nikolai Alekseevich Borsch, and Nikolay Vladimirovich Kuvardin. "2(4)-Aminopyridines as Ligands in the Coordination and Extraction Chemistry of Platinum Metals." In Exploring Chemistry with Pyridine Derivatives. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.106376.

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The specific behavior of aromatic amines in the coordination and extraction processes of isolation and separation of platinum and other metals is discussed using the example of 2(4)-aminopyridines (2(4)-AP). As intrasphere ligands, 2(4)-AP have a high electron-donor capacity due to the pumping of an easily polarizable π-electron density. The chemistry of the extraction of platinum metals, iridium in particular, is considered: depending on the conditions, ion associates, coordination-solvated compounds or compounds containing an amine in the inner and outer coordination sphere of the metal are
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"Mathematical Design of Nanomaterials From Clusters of Higher Dimension." In Nanotechnologies and Clusters in the Spaces of Higher Dimension. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3784-8.ch008.

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Using concrete examples of clusters of chemical compounds of various types (intermetallic clusters, metal chains with ligands, polyhedral metal clusters with ligands), it is shown how nanomaterials are formed from individual clusters by multiplying their geometric structure by other geometric elements of different dimensions. The considered examples correspond to nanomaterials with a structure of limited complexity. However, the mathematical apparatus developed on the basis of the geometry of high-dimensional polytopes allows, in principle, to describe and study and design nanomaterials of thi
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LI, Yamei. "Minerals as Prebiotic Catalysts for Chemical Evolution towards the Origin of Life." In Mineralogy [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.102389.

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A transition from geochemistry to biochemistry has been considered as a necessary step towards the emergence of primordial life. Nevertheless, how did this transition occur is still elusive. The chemistry underlying this transition is likely not a single event, but involves many levels of creation and reconstruction, finally reaching the molecular, structural, and functional buildup of complexity. Among them, one apparent question is: how the biochemical catalytic system emerged from the mineral-based geochemical system? Inspired by the metal–ligand structures in metalloenzymes, many researche
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Kutus, Bence, and Pál Sipos. "Complex Formation in Hyperalkaline Solutions." In Metal Ions and Complexes in Solution. Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781839169601-00313.

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Strongly alkaline conditions in aqueous systems may give rise to the formation of novel, so far undiscovered metal complexes, and crystallization from these systems often yields solid materials with peculiar local structures. This is of particular importance from a practical point of view, since the knowledge of the structure and dynamics of these solution species could be the key to understand and to manipulate a large variety of processes, both industrial and geochemical. The current contribution is focused on solution species with ligands as hydroxides, organic molecules with O-donor atoms,
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Jolivet, Jean-Pierre. "Condensation in Solution: Polycations and Polyanions." In Metal Oxide Nanostructures Chemistry. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190928117.003.0006.

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Condensation of metal complexes in solution forms entities in which the cations are linked by hydroxo (HO−) or oxo (O2−) bridges. The reaction is initiated by the addition of a base to an aquocomplex: . . . 2[Cr(OH2)6]3++ 2HO- → [Cr2(OH)2(OH2)8]4+ + 2 H2O . . . or by the addition of an acid to an anionic complex: . . . 2 [CrO4]2- + 2H+ → [Cr2O7]2- + H2O . . . Thus, purely aquo- and purely oxocomplexes are stable in solution, and the condensation of cations is initiated by hydroxylation. With regard to electrically charged hydroxylated complexes, the reaction forms discrete and soluble entities
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"PAA adsorption on aluminum oxide was found to decrease with an increase in pH (Figure 2). The adsorption is ligand-like and is identical with that noted by other investigators [10,11]. The adsorption shows a monotonie decline with increasing pH. A maximum of 90% adsorption was obtained at the lowest pH value. Similar adsorption curves were obtained in the adsorption of humic and fulvic acids on alumina [5]. The ligand exchange refers specifically to direct bond formation between a carboxylate group and a metal ion center of the surface (Al(III) this case). The adsorption trend observed in ligand-like adsorption results from competition for H+ by anions and the mineral surface and is characterized by the mineral pHzpc and the pKa of the sorbate [3]. PAA has an average pKa of 4.5 [11]. The surface sites of an aluminum oxide particle are protonated and positively charged at a pH value below the pHzpc (8.9 for the aluminum oxide used in this study; they are deprotonated and negatively charged at pH values higher than pHzpc. At lower pH PAA is negatively charged and therefore will be adsorbed strongly on the more energetic available positive A120 3 sites. With increasing pH, as the sites become negative, the PAA percentage adsorption decreases. The second step in this study is to analyze the Cd adsorption on A120 3 in the presence of PAA. The presence of a complexing ligand can enhance or decrease the extent of metal adsorption on oxides. The functionality and adsorptive properties of the ligand determine its effect on metal uptake. In the system containing both Cd(II) and PAA, the surface (aluminum oxide) and the ligand (PAA) compete for the metal ions. The differences in the adsorption of Cd(II) on aluminum oxide in the presence of PAA can be explained by." In Hazardous and Industrial Waste Proceedings, 30th Mid-Atlantic Conference. CRC Press, 2014. http://dx.doi.org/10.1201/9781498709453-114.

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Conference papers on the topic "Metal Complexing Ligand"

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Haskaj, Adelina, Musaj Pacarizi, Sonja Lepitkova, Berat Sinan, Bahri Sinani, and Elida Dreshaj. "THE POTENTIAL COMPLEXING IMPACT OF SOME ORGANIC COMPOUNDS AMINE AND CARBOXYL GROUPS ON TRANSITION METALS." In 24th SGEM International Multidisciplinary Scientific GeoConference 24. STEF92 Technology, 2024. https://doi.org/10.5593/sgem2024/4.1/s18.42.

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Environmental water chemistry is substantially aided by modern electrochemical research. Sensitive voltammetric techniques are much more useful for metal species in natural waters, where complexation with organic molecules predominates. Many environmental electrochemists are still interested in determining the stability constants of metal ion complexes with various ionic species found in natural waterways. The aim of this work is to investigate the possible influence of complexation of amine and carboxyl groups of some organic molecules (with EDTA, NTA and aniline, using differential pulse pol
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Povar, I., O. Spynu, and A. Vishnevsky. "THERMODYNAMIC ANALYSIS OF SYNERGISTIC INTERACTIONS IN THE OPTIMIZATION OF PHOSPHORUS RECOVERY FROM WASTEWATER THROUGH STRUVITE CRYSTALLIZATION." In Scientific and practical conference with international participation "Geo- and bioecological problems of the middle and lower Dniester river basin". A.O. Asociația Internațională a Păstrătorilor Râului Eco-TIRAS, 2024. https://doi.org/10.70739/gbp2024.39.

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The paper emphasizes the importance of synergistic interactions in the phosphorus recovery process, making struvite a preferred choice due to its nature as a complex mineral containing two cations. The developed thermodynamic approach to studying chemical and synergistic equilibria in homogeneous and heterogeneous multi-component systems is applied to determine the optimal concentrations of wastewater components for maximum struvite precipitation. Various possible chemical interactions in aqueous solutions are considered, including hydrolysis of metal ions, protonation of ligands, and complex
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Aleksandrova, Yu I., D. N. Shurpik, and I. I. Stoikov. "Synthesis of macrocyclic ligands based on monosubstituted pillar[5]arenes containing amidopyridine fragments and study of their complexing properties with d-metal cations." In ACTUAL PROBLEMS OF ORGANIC CHEMISTRY AND BIOTECHNOLOGY (OCBT2020): Proceedings of the International Scientific Conference. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0069218.

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Reports on the topic "Metal Complexing Ligand"

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Donat, John R., and David J. Burdige. Metal-complexing Ligands and Metal Speciation in Sediment Pore Waters: Implications for Sediment/water Exchange and Water Column Speciation. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada635224.

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