Calcium Complexes Research Articles

Вплив іонно-сольового складу води на якість пива

Minerals dissolved in water have an important effect on the overall chemistry of the brewing process. Ions from these minerals affect the pH of water, its hardness, alkalinity and mineral composition. These parameters are the most important factors in determining the suitability of water for brewing, in particular for the mashing process. For that reason, it is very important to study the ion-salt composition of mash water and its influence on the quality of beer. The method of regulating the ion-salt composition of water, which is necessary for its use in the mashing process in order to obtain high-quality beer is discussed in the article. Prepared water obtained by reverse osmosis is free from ions as much as possible, which enabled to prepare water with the necessary ion-salt composition for rubbing by adding appropriate salts. Using prepared water in the mashing process, beer samples were obtained, which were evaluated according to sensory and physicochemical indicators. The effect of ion-salt composition of mash water on beer quality indicators was studied. It was found that calcium and sodium cation complexes, as well as a mixture of sulfates and chlorides dissolved in the water used for the mashing process, have the most significant impact on beer quality. Concentrations of individual ions in such water do not show any pronounced dependence on beer quality indicators. It was studied that the increase in the ratio of cations Ca2+/Na+ and sulfates and chlorides SO4 2- /Cl in the mash water has a positive effect on the sensory and quality indicators of beer: the ratio of key ions affects hop bitterness to the greatest extent among the quality indicators of beer. In addition, the ratio of Ca2+/Na+ cations has a positive effect on the foam resistance of beer, and the ratio of sulfates and chlorides SO4 2- /Cl leads to an increase in the share of alcohol in the finished drink. According to the tasting evaluation of beer, samples with a higher ratio of key ions have a brighter taste and aroma.

A Tetranuclear Copper(II)/Calcium(II) Complex as Dual Chemosensor for Colorimetric and Fluorescent Detection of Non-Steroidal Anti-Inflammatory Drugs.

The tetranuclear Cu2+ /Ca2+ /Ca2+ /Cu2+ complex based on Malten ligand has been investigated as a platform for anion binding. Simple organic carboxylates and non-steroidal anti-inflammatory drugs (NSAIDs) have been tested, revealing the ability of the platform to bind them. The receiving platform hosts at least two guests in solution although a third anion can be bound, as suggested by X-ray diffraction analysis. The addition of the anions is accompanied by a color change of the solution, making the system a colorimetric sensor for carboxylates (LOD values comprised between 3.6 and 20.7 ppm). A fluorescent system consisting of the 2-(3-oxido-6-oxoxanthen-9-yl)benzoate (fluorescein anion) linked to the tetranuclear platform has been also prepared and used in a chemosensing ensemble approach to signal the presence of the selected anions (Log K between 2.6 and 5.6 for the addition of two guests). The latter also works in a paper strip test, offering the chemosensor a possible practical application.

Deep Chemical and Physico-Chemical Characterization of Antifungal Industrial Chitosans-Biocontrol Applications.

Five different chitosan samples (CHI-1 to CHI-5) from crustacean shells with high deacetylation degrees (>93%) have been deeply characterized from a chemical and physicochemical point of view in order to better understand the impact of some parameters on the bioactivity against two pathogens frequently encountered in vineyards, Plasmopara viticola and Botrytis cinerea. All the samples were analyzed by SEC-MALS, 1H-NMR, elemental analysis, XPS, FTIR, mass spectrometry, pyrolysis, and TGA and their antioxidant activities were measured (DPPH method). Molecular weights were in the order: CHI-4 and CHI-5 (MW >50 kDa) > CHI-3 > CHI-2 and CHI-1 (MW < 20 kDa). CHI-1, CHI-2 and CHI-3 are under their hydrochloride form, CHI-4 and CHI-5 are under their NH2 form, and CHI-3 contains a high amount of a chitosan calcium complex. CHI-2 and CHI-3 showed higher scavenging activity than others. The bioactivity against B. cinerea was molecular weight dependent with an IC50 for CHI-1 = CHI-2 (13 mg/L) ≤ CHI-3 (17 mg/L) < CHI-4 (75 mg/L) < CHI-5 (152 mg/L). The bioactivity on P. viticola zoospores was important, even at a very low concentration for all chitosans (no moving spores between 1 and 0.01 g/L). These results show that even at low concentrations and under hydrochloride form, chitosan could be a good alternative to pesticides.

A 2,2'-bipyridyl calcium complex: synthesis, structure and reactivity studies.

A 2,2'-bipyridyl calcium complex based on a tridentate ligand [CH3C(N-2,6-iPr2C6H3)CHC(CH3)NCH2CH2N(CH3)2]Ca(bipy)(THF) (1) was prepared by the reduction of {[CH3C(N-2,6-iPr2C6H3)CHC(CH3)NCH2CH2N(CH3)2]CaI(THF)}2 with potassium graphite in the presence of 2,2'-bipyridine (bipy). Complex 1 is a good Ca(I)synthon, as shown by its reactivity with I2, PhCH2SSCH2Ph, PhCH2SeSeCH2Ph and 9-fluorenone, yielding the calcium iodide complex [CH3C(N-2,6-iPr2C6H3)CHC(CH3)NCH2CH2N(CH3)2]CaI(bipy) (2), calcium thiolate [CH3C(N-2,6-iPr2C6H3)CHC(CH3)NCH2CH2N(CH3)2]Ca(SCH2Ph)(bipy) (3), calcium selenolate [CH3C(N-2,6-iPr2C6H3)CHC(CH3)NCH2CH2N(CH3)2]Ca(SeCH2Ph)(bipy) (4), and calcium ketyl complex [CH3C(N-2,6-iPr2C6H3)CHC(CH3)NCH2CH2N(CH3)2]Ca[O-(9-C13H8˙)](bipy)·2THF (5·2THF), respectively. In addition, reactions of complex 5 with CS2, CH2CHCH2Br and PhCH2Br give the corresponding dimeric bis(thiolate) complex {[S2CC(CMe(NAr))C(Me)NCH2CH2NMe2]Ca(DME)}2 (6), dimeric calcium bromide complex {[(9-CH2CHCH2-C13H8-9)-O]CaBr(THF)(bipy)}2 (7) and {[(9-C6H5CH2-C13H8-9)-O]CaBr[O-(9-C13H8)](bipy)}2 (8). These results demonstrated that the calcium ketyl complex 5 can also be employed as a single-electron transfer reagent. All the new compounds were characterized by various spectroscopic methods, and their solid-state structures were further confirmed by single-crystal X-ray diffraction analyses.

Activation of the N2 molecule by means of low-valence complexes of calcium and magnesium.

Nitrogen gas is a highly inert molecule and its activation under mild conditions represents a crucial goal in current research. In a recent study, the discovery of low-valence Ca(I) compounds capable of coordinating and reducing N2 was reported [B. Rösch, T. X. Gentner, J. Langer, C. Färber, J. Eyselein, L. Zhao, C. Ding, G. Frenking and S. Harder, Science, 2021, 371, 1125]. The study of low-valence alkaline earth complexes represents a new horizon in inorganic chemistry and demonstrates examples of spectacular reactivity. For example, complexes of the [BDI]2Mg2 type are selective reducing reagents in both organic and inorganic synthesis reactions. To date, however, no activity of Mg(I) complexes in the activation of the nitrogen molecule has been reported. By computational studies, in the present work, we investigated the analogies and differences of low-valence Ca(I) and Mg(I) complexes in the coordination, activation and protonation of N2. We have shown that the possibility of alkaline earth metals to employ atomic orbitals of the d type is reflected in the differences in the N2 binding energy and its coordination mode (end-on vs. side-on), as well as in the spin state of the resulting adduct (singlet vs. triplet). These divergences are finally observed in the subsequent protonation reaction, which turned out to be prohibitive in the presence of Mg.

Injectable remodeling hydrogels derived from alendronate-tethered alginate calcium complex for enhanced osteogenesis

A combination of hydrogel materials, and therapeutic agents have been actively reported to facilitate bone defect healing. However, conventionally hydrogels using cross-linker would result in low stability of the hydrogel itself, loss of agents during cross-linking, and complexity of use. In this study, alendronate was tethered to an AlA to improve its bone healing and drug-loading stability. AlA was further functionalized with Ca2+ (AlACa). A mixture of AlACa and alginate formed AlAA hydrogel. The gelation time of AlAA was sufficient for injecting into the defect site. The hydrogel stiffness was controlled, while the stress-relaxation time was fixed. In vitro cell tests demonstrated that the AlAA promoted proliferation and differentiation behaviors. In particular, AlAA showed the best mechanical stiffness with appropriate stress-relaxation and cellular behavior, indicating that it would be beneficial as a scaffold in the bone tissue engineering field.

Pyrolysis behaviors of model compounds with representative oxygen-containing functional groups in carbonaceous feedstock over calcium

Compounds with different functional groups and bridged bonds have been extensively used as model compounds of carbonaceous feedstock to investigate the mechanism of catalytic pyrolysis. Aiming to understand the structure evolution mechanism of different oxygen-containing functional groups and weak-covalent bonds during catalytic pyrolysis of carbonaceous feedstocks over calcium, polyacrylic acid, polyvinyl alcohol, polyethylene terephthalate, and polymethyl methacrylate were used as model compounds. The structural characteristics, reactivity, and pyrolysis products of model compounds with and without calcium addition were investigated by using X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, thermal gravimetric analysis, and in-situ pyrolysis vacuum ultraviolet photoionization time-of-flight mass spectrometry (in-situ Py-VUV-PIMS). The results show that calcium can form calcium complexes with the carboxyl or alcoholic hydroxyl structures in the long aliphatic carbon chain, but it has no obvious effect on the structure and reactivity of the ester groups in different compounds. The pyrolysis products analysis showed that the chemical structure and decomposition pathway of the model compounds containing carboxyl or alcoholic hydroxyl groups changed significantly after calcium addition, and a large number of carbonyl compounds appeared in the pyrolysis products. This result provides a theoretical basis for understanding the mechanism of calcium-catalyzed carbonaceous feedstock pyrolysis.

Azobenzenyl Calcium Complex: Synthesis and Reactivity Studies of a Ca(I) Synthon.

Attempted preparation of a low-valent Ca(I) complex by reduction of Ca iodide precursor [LCaI(THF)]2 (1) (L = [CH3C(NAr)CHC(CH3)NCH2CH2N(CH3)2]-, Ar = 2,6-iPr2C6H3), with KC8 led to isolation of a dinuclear calcium azaallyl complex {[H2CC(NAr)CHC(CH3)(NCH2CH2N(CH3)2)]Ca(THF)}2 (2). Alternatively, reaction of 1 with KC8 in the presence of azobenzene gives an azobenzenyl calcium complex LCa(PhNNPh)(THF) (3). The electron paramagnetic resonance and UV-vis spectra of complex 3 suggest that the (PhNNPh) moiety should be regarded as a radical anion. Complex 3 can react with Me3SiN3, Me3SiCHN2, CS2, W(CO)6, elemental sulfur, and AgBr, resulting in the formation of the azido complex [LCaN3(THF)]2 (5), isonitril complex {LCa[CNN(Si(CH3)3)]}2 (6), dimeric bis(thiolate) complex {[S2CC(CMe(NAr))C(Me)NCH2CH2NMe2]Ca(DME)}2 (7), metallocyclic carbene complex {[OC(W(CO)5)N(C6H5)]Ca(THF)3}2 (8), bis(thiolate) complex {[S2C(CMe(NAr))C(Me)NCH2CH2NMe2]Ca(THF)}2 (9), and bromide complex [LCaBr(THF)]2 (10). Additional insights on the reaction process resulting in the formation of complex 7 are provided by density-functional theory studies. These results demonstrate that the (PhNNPh)•- radical anion can serve as a very potent one-electron donor, and 3 acts as a low-valent calcium(I) synthon.

Calcium Complexes of Oxicams: New Dimensions in Rheumatoid Arthritis Treatment

Various metals have been complexed with drugs to improve their cellular impact. Inflammatory diseases like rheumatoid arthritis (RA) are characterized by unbalanced production of proinflammatory cytokines (PICs) and prostaglandins with decreased levels of vitamin D and calcium. The inflammation can be suppressed through targeting the formation of PICs or related enzymes by various treatment strategies that involve the use of corticosteroids, disease-modifying antirheumatic drugs and NSAIDs. We present a detailed review on the impact of calcium complexes of oxicams as an advanced treatment strategy for RA. The calcium complexes demonstrate promising capabilities to cure the disease, improve the strength of bones and suppress PICs in RA.

Anionic Magnesium and Calcium Hydrides: Transforming CO into Unsaturated Disilyl Ethers

AbstractThe synthesis, characterisation and reactivity of two isostructural anionic magnesium and calcium complexes is reported. By X‐ray and neutron diffraction techniques, the anionic hydrides are shown to exist as dimers, held together by a range of interactions between the two anions and two bridging potassium cations. Unlike the vast proportion of previously reported dimeric group 2 hydrides, which have hydrides that bridge two group 2 centres, here the hydrides are shown to be “terminal”, but stabilised by interactions with the potassium cations. Both anionic hydrides were found to insert and couple CO under mild reaction conditions to give the corresponding group 2 cis‐ethenediolate complexes. These cis‐ethenediolate complexes were found to undergo salt elimination reactions with silyl chlorides, allowing access to small unsaturated disilyl ethers with a high percentage of their mass originating from the C1 source CO.

Anionic Magnesium and Calcium Hydrides: Transforming CO into Unsaturated Disilyl Ethers.

The synthesis, characterisation and reactivity of two isostructural anionic magnesium and calcium complexes is reported. By X-ray and neutron diffraction techniques, the anionic hydrides are shown to exist as dimers, held together by a range of interactions between the two anions and two bridging potassium cations. Unlike the vast proportion of previously reported dimeric group 2 hydrides, which have hydrides that bridge two group 2 centres, here the hydrides are shown to be "terminal", but stabilised by interactions with the potassium cations. Both anionic hydrides were found to insert and couple CO under mild reaction conditions to give the corresponding group 2 cis-ethenediolate complexes. These cis-ethenediolate complexes were found to undergo salt elimination reactions with silyl chlorides, allowing access to small unsaturated disilyl ethers with a high percentage of their mass originating from the C1 source CO.

FEATURES OF THE ACCUMULATION OF METAL IONS IN SLUDGES OF THE BIOENERGY COMPLEX

A study of the accumulation of metal ions in the sludge of the bioenergy complex after burning the plant's raw materials was carried out. The value of the content of toxic metals (cadmium, lead, and mercury) is less than an order of magnitude than the MPC for soils. The presence of a complex of trace elements, iron, calcium, magnesium, and sodium in sludge makes them attractive for use as raw materials for production of organic-mineral fertilizers for the cultivation of a sufficiently wide range of agricultural and ornamental crops. It was studied that distribution of heavy metals in sludge of the filtration fields in different depths : 1 – from the surface (1–5 cm), 2 – from the middle (~500 cm) and 3 – from a depth &gt; 1500 cm. The distribution of metal's ions accumulation established that the maximum content of cadmium and nickel observed in the surface layer of silt, lead in the middle layer, and manganese in the deep (more than 1500 m) layer. Such distribution of heavy me­tals shows, that the maximum concentration of cadmium and lead takes place in the surface layer of silt, lead in the middle layer , and manganese in the deep (more than 1500 m) layer. Thus, the deep layer is the safest to use as a raw material in production of fertilizers. But the presence of cadmium and lead, which have cumulative properties, in all layers of sludge is a risk factor for using sludge as fertilizers for crops that will be used for food purposes but can be use for growing technical crops and ornamental plants. Also, the presence of aluminum and titanium in the composition of the sludge requires a more detailed study. The final decision is possible only after conducting field tests, with subsequent analytical control of products and soil after harvesting.

Calcium Binding Mechanism of Soybean Peptide with Histidine Alteration by Molecular Docking Analysis and Spectroscopic Methods

Histidine (His) carries a unique heteroaromatic imidazole side chain and plays an irreplaceable role in peptides and proteins. With the current study, we aimed to determine the characteristics and functional activities of the bone density of soy peptide–calcium complexes in which a His residue was replaced by Leu (CBP-H). Soybean peptide (CBP-H) was chemically synthesized, the binding mechanism between CBP-H and calcium ions in combination was determined with bioinformatics and spectroscopy analysis, and the difference between CBP and CBP-H was investigated. Finally, we analyzed the effect of CBP and CBP-H on osteoblasts in vitro. The results showed that CBP-H could bind to calcium ions, and the calcium coordinated with the carboxyl groups of Asp and Glu in the peptide. The nitrogen atoms of the amino group and the oxygen atoms of the carboxyl group in CBP-H significantly contributed to the coordination with Ca2+. Furthermore, the binding capacity was 36.48 ± 0.09 mg/g, similar to CBP. However, both CBP and CBP-H could promote osteogenic activity, the activity of CBP-H was 127.147%, lower than CBP (121.777%). While it had the same ability to promote intracellular calcium concentration, CBP-H could upregulate 150.12% calcium ions into the intracellular, and the rate of the rise of CBP was 158.91%, further highlighting the potential of His residues for binding calcium and treating osteoporosis.

Binding mechanism and bioavailability of a novel phosvitin phosphopeptide (Glu-Asp-Asp-pSer-pSer) calcium complex

Phosvitin has excellent calcium binding capacity, related to its phosphopeptides. The phosphopeptides may be used as functional ingredients for improving calcium bioavailability, but the calcium-binding mechanism is unclear. In this study, a novel phosvitin phosphorylated pentapeptide (Glu-Asp-Asp-pSer-pSer, EDDpSpS) was selected to prepare an EDDpSpS calcium complex (EDDpSpS-Ca), and the calcium-binding mechanism and bioavailability investigated. The calcium-binding capacity of EDDpSpS was up to 468 ± 152.80 mg/g. Calcium ions prompted the folding of the EDDpSpS structure to form spherical nanoparticles. The calcium binding sites of EDDpSpS involved peptide bonds, carboxyl, amino, and phosphate groups. Molecular forces involved in these interactions were electrostatic in nature. Moreover, EDDpSpS-Ca had excellent bioavailability when compared to CaCO3, calcium lactate, and d-calcium gluconate. This study revealed the calcium-binding mechanism of phosvitin phosphopeptide, and suggested that EDDpSpS-Ca has the potential to be a novel, efficient, and promising calcium supplement.

Transdermal release behaviors of bioactive deep eutectic solvents as natural skin care and mechanism

This study focused on offering relatively systematic study on transdermal behaviors, bioactivity and mechanism of deep eutectic solvents (DESs) and finding out whether they could be used as a potential natural skin care medium with promoted release performance. A series of new bioactive DESs with potential effects (including 4-methoxy salicylic acid-betaine, lactic acid-betaine, malic acid-betaine, malic acid-choline chloride, malic acid-l-carnitine, mandelic acid-betaine, phytic acid-betaine) were synthesized and their permeation behaviors were all investigated by using bionic and mice skins. It showed that the transdermal releasing process could be mainly controlled by both concentration and viscosity of specific DESs, and 1000 mg/mL phytic acid-betaine (the molar ratio of 3:1) aqueous solution exhibited the highest penetration rate and cumulative release amount (54.5 mg/cm2). Then the influence of phytic acid-betaine (3:1) on the tested transdermal materials were evaluated by multiple characterizations including porosity, scanning electron microscopy (SEM), thermogravimetry (TG), and Fourier transform infrared spectra (FT-IR), etc., and no obvious damage was observed on the skin surface. Furthermore, no composition change of phytic acid-betaine was obviously found before and after transdermal process. Besides reported moisture retention (hygroscopicity), phytic acid-betaine variants showed strong antioxidant activity, calcium complexation ability and little irritation to human skin. Especially, related bioactive oil-in-DES microemulsion was prepared to broaden their application forms for the first time. Furthermore, the intrinsic rules between viscosity and hydrogen bond were explored by quantum chemistry calculations to clarify the difference in their permeation behaviors, and the interactions between DES components and tyrosinase were evaluated by molecular docking. As the result, above DESs played the dual roles of active ingredients and self-promoting penetration agents.

FORMULATION AND EVALUATION OF FAST DISINTEGRATING TABLET OF PROPRANOLOL HYDROCHLORIDE USING MODIFIED TAMARIND SEED GUM AS A NATURAL SUPERDISINTEGRANT

Objective: The present study was carried out for the preparation of modified Tamarindus indica seed gum as a natural superdisintegrant and assessed various parameters for preparing a fast disintegrating dosage form. Methods: The extracted gum from tamarind seeds was chemically modified by the carboxymethylation method. Then, calcium complexation of carboxymethyled tamarind seed gum was done. Fast disintegrating tablets were prepared by the direct compression method. The change in the functional groups of the extracted gum, Carboxymethyl tamarind seed gum, and the calcium complexed tamarind seed gum was studied by FT-IR spectrophotometer. DSC studies of calcium complexed tamarind seed gum showed alterations in the melting point without undergoing any modification. Results: The pre-formulation studies such as physical appearance, swelling index, and viscosity of calcium complexed tamarind seed gum were characterized. From the studies, it was concluded that modified Tamarind seed gum was acidic and hydrophilic. The pH of the extracted tamarind seed gum was found to be 5.4. The fast disintegrating tablets were evaluated for hardness, friability, disintegration time, thickness, and in-vitro dissolution study. In the present study, the disintegration time of calcium complexed tamarind seed gum-containing tablets was compared with the marketed formulation of croscarmellose sodium as a synthetic superdisintegrant. The F5 formulation of calcium complexed tamarind seed gum showed a disintegration time of 37±2 s whereas the marketed formulation of croscarmellose sodium showed a disintegration time of 48±2 s. Conclusion: It can be concluded that a fast disintegrating tablet prepared using calcium complexed Tamarind seed gum improves the disintegration time of the tablet.

Recent Progress of Calcium-Based Catalysts in Organic Transformations

Abstract: This article aims to draw the attention of the scientific community toward the use of calcium-based reagents in various organic transformations. These complexes are capable of activation and nucleophilic addition of olefins, carbonyls, nitro groups of catalysts, epoxides, methyl aromatics and alcohols. These complexes are capable of activating different functional groups for nucleophilic addition to alkene, carbonyl, nitro, epoxide, methylarene and alcohol groups. Calcium-based catalysts have broad tolerance to substrates, reaction pathways, and appear to be sustainable alternatives to transition metals, rare earth metals, for a variety of organic transformations. The scope of this review is limited to catalytic alterations mediated by calcium complexes. This is the first broad review article that covers all aspects of calcium-mediated reactions up to the year 2022.

Synthesis of nickel, calcium and magnesium naphthalene diimide complexes as supercapacitor materials

Synthesis of nickel, calcium and magnesium naphthalene diimide complexes as supercapacitor materials

Isolation, Purification and Structure Identification of a Calcium-Binding Peptide from Sheep Bone Protein Hydrolysate.

To isolate a novel peptide with calcium-binding capacity, sheep bone protein was hydrolyzed sequentially using a dual-enzyme system (alcalase treatment following neutrase treatment) and investigated for its characteristics, separation, purification, and structure. The sheep bone protein hydrolysate (SBPH) was enriched in key amino acids such as Gly, Arg, Pro, Leu, Lys, Glu, Val, and Asp. The fluorescence spectra, circular dichroism spectra, and Fourier-transform infrared spectroscopy results showed that adding calcium ions decreased the α-helix and β-sheet content but significantly increased the random and β-turn content (p < 0.05). Carboxyl oxygen and amino nitrogen atoms of SBPH may participate in peptide–calcium binding. Scanning electron microscopy and energy dispersive spectrometry results showed that SBPH had strong calcium-chelating ability and that the peptide–calcium complex (SBPH–Ca) combined with calcium to form a spherical cluster structure. SBPH was separated and purified gradually by ultrafiltration, gel filtration chromatography, and reversed-phase high-performance liquid chromatography. Liquid chromatography-electrospray ionization/mass spectrometry identified the amino acid sequences as GPSGLPGERG (925.46 Da) and GAPGKDGVRG (912.48 Da), with calcium-binding capacities of 89.76 ± 0.19% and 88.26 ± 0.25%, respectively. The results of this study provide a scientific basis for the preparation of a new type of calcium supplement and high-value utilization of sheep bone.

Synthesis, Structure, and Spectroscopic Properties of Calcium Thiophenecarboxylate Polymers. Structural Comparison with Analogous Lead Complexes

AbstractThree novel calcium coordination polymers [Ca(2tpCOO)2(2mpa)(H2O)]n (1), [Ca(3tpCOO)2(2mpa)(H2O)]n (2), and {[Ca(3tpacCOO)2(H2O)2] ⋅ H2O}n (3) (2tpCOO− or 3tpCOO− – thiophene‐2‐ or thiophene‐3‐carboxylate, 3tpacCOO− – thiophene‐3‐acetate, 2mpa – 2‐methylpropanal), were synthesised using a self‐assembly method. The obtained polymers were characterised using SC‐XRD, FTIR, UV‐Vis DRS, thermogravimetric and luminescence analyses. The polymer fluorescence studies showed that calcium complexes can emit light of different colours ranging from violet (1) and blue (2) to green (3). The molecular structure of each polymer consists of a calcium ion at the centre of a dodecahedral coordination sphere. The crystal structure consists of one dimensional zig‐zag chains that form a three‐dimensional network via π⋅⋅⋅π, C−H⋅⋅⋅π and O−H⋅⋅⋅O or O−H⋅⋅⋅S interactions. Additionally, a comparative structural analysis of CaCPs with lead(II) coordination polymers containing analogous linkers was performed as part of modelling studies to explore the substitution of calcium ions by lead ions in biological polymers.