Primary studyCore evidenceTransport Physics

2-Cyano-2-isonitrosoacetamide and its Ag(I) complexes. Silver(I) cyanoximate as a non-electric gas sensor

Gerasimchuk N., Esaulenko A.N., Dalley K.N. et al. · Dalton Transactions · 2010 · 749-764

7materials
8samples
7synthesis routes
9measurements
28results
5claims and caveats

Evidence map

Open a family to keep every result attached to its sample, method and conditions.

Author interpretations and caveats

Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.

Application RelevanceSupport assessment: Medium

Solid complex 6 is proposed as a battery-less, non-electrical, colourimetric gas sensor material for C2H2, NO and possibly SO2.

Caveat: Demonstrated as powder/cuvette photoluminescence and colour change; no packaged device performance metrics are reported.

p013 / article p.761 · Photoluminescence of 6 · Figures 10-13 · Linked to 4 structured results

CaveatSupport assessment: High

The electrical data in this paper are solution conductance measurements in DMSO and show dissociation/loss of solid-state structures, not electronic conductivity of the intact Ag(I) coordination polymer.

Caveat: The authors use the term electrical conductivity, but the measurement is explicitly on 1 mM/0.001 M solutions.

p011 / article p.759 · Solutions electrical conductivity of silver(I) complexes · Linked to 2 structured results

Phase AssignmentSupport assessment: High

Complex 6 is assigned as a unique layered 2D Ag(I) cyanoximate coordination polymer with short argentophilic interactions.

Caveat: Single-crystal refinement of 6 was complicated by thin plates and non-merohedral twinning.

p007 / article p.755 · Crystal structure of 6 · Figures 2-4 · Linked to 2 structured results

Structure Property LinkSupport assessment: Medium

Complex 9 contains a short Ag-H-C/Ag-CH2 agostic contact, reported as the shortest such distance in non-organometallic silver complexes with neutral ligands.

Caveat: The superlative is based on the authors' CSD search reported in the paper and SI S13-S14.

p009 / article p.757 · Crystal structure of 9 · Figure 8; ESI S13-S14 · Linked to 1 structured result

Structure Property LinkSupport assessment: Medium

The authors attribute complex 6's unusual visible-light insensitivity to covalent bonding in the coordination polymer and pronounced short argentophilic contacts.

Caveat: Mechanistic attribution is stated by authors; no comparative photophysical mechanism calculation is reported.

p014 / article p.762 · Conclusions · Linked to 2 structured results

Material identities

Names and aliases are kept exactly within the paper’s own identity model.

MaterialCompositionStructure contextSource
Ag{NC-C(N=O)-C(O)NH2}.2Pic (complex 7)C15H16AgN5O2Mononuclear Ag(I) centre · bidentate chelating cyanoxime anion 1- plus two 2-picoline ligands0D · Model SystemMonomeric distorted tetrahedral Ag(I) complex; triclinic P-1.p008 / article p.756 · Crystal Structure of 7 · Figure 5; Table 4
Ag(I) 2-cyano-2-isonitrosoacetamide / Ag(ACO) (complex 6)C3H2AgN3O2Ag(I) centres with short Ag-Ag argentophilic contacts · cyanoxime anion 1- acting as chelating and bridging ligand through nitroso/amide oxygen and nitrogen donors2D · PristineLayered 2D silver(I) coordination polymer in monoclinic P21/c; anion 1- is planar, nitroso-form and cis-anti; Ag-Ag contacts at 3.1934(8) A form polymeric chains and pleaded sheets.p007 / article p.755 · Crystal structure of 6 · Figures 2-4; Table 3
silver(I) 2-cyano-2-isonitrosoacetamide bis(ammine) (complex 8)C3H8AgN5O2Linear Ag(NH3)2+ cation · non-coordinated cyanoxime anion 1-0D · Model SystemIonic monomeric Ag(NH3)2+ cyanoximate salt; monoclinic polar P21.p009 / article p.757 · Crystal structure of 8 · Figure 6; Table 5
Ag(14ane[N4]){NC-C(N=O)-C(O)NH2}.CH3CN (complex 9)C20H31AgN8O2Ag(I) centres in [Ag(N4)]+ cationic chains · meso-tetraazamacrocyclic ligand bridging Ag(I); cyanoxime anion is non-coordinated; CH3CN solvate1D · PristineZigzag infinite coordination polymer of cationic [Ag(N4)]+ units with bridging tetraazamacrocyclic ligand; monoclinic P21/n.p009 / article p.757 · Crystal structure of 9 · Figure 7; Scheme 3; Table 6
cesium cyanoximate salt Cs(ACO) (compound 5)C3H2N3O2CsCs+ counterion · fully deprotonated cyanoxime anion 1-0D · Model SystemIonic cyanoxime salt; orange-yellow prisms.p005 / article p.753 · Synthesis of compounds
2-cyano-2-isonitrosoacetamide (HACO, compound 1)C3H3N3O2; crystallographic asymmetric formula reported as C6H6N6O4none · 2-cyano-2-isonitrosoacetamide / amide-cyanoxime0D · Model SystemMolecular ligand; monoclinic P21/c crystal structure with planar molecules and extensive hydrogen bonding.p001 / article p.749 · Abstract
sodium acid salt NaH(ACO)2 (compound 4)C6H5NaN6O4Na+ counterion · amide-cyanoxime acid salt0D · Model SystemIonic cyanoxime salt; no framework structure reported in this paper.p004-p005 / article pp.752-753 · Synthesis of compounds · Scheme 1

Sample register

Sample form, processing state and composition status define the context for measurements.

Show 8 sample records
SampleForm and roleProcessing and geometrySource
0.001 M solution of complex 6 in anhydrous DMSOresearch_0314__mat__ag_aco_6Unknown · Target Sample · UnknownComplex 6 dissolved to modest solubility in anhydrous DMSO for conductance measurement at 296 K.p003 / article p.751 · Materials and physical measurements
solid complex 6research_0314__mat__ag_aco_6Powder · Target Sample · Pristine FrameworkBright-yellow precipitate washed with water and methanol and dried over P2O5; crystalline material forms very thin plates.powder spread over approximately 1 cm2 for PL sensingp005 / article p.753 · Synthesis of compounds
dark-yellow prisms of complex 7research_0314__mat__ag_aco_2pic_7Single Crystal · Target Sample · ModelCrystallised from hot 2-picoline solution of complex 6; stored in closed vial with NaOH pellets.p006 / article p.754 · Synthesis of compounds
orange-yellow needles of complex 8research_0314__mat__ag_aco_ammine_8Single Crystal · Target Sample · ModelObtained from saturated aqueous ammonia solution of 6 by slow ethanol vapour diffusion over 4 months.p006 / article p.754 · Synthesis of compounds
light-brown blocks of complex 9research_0314__mat__ag_n4_aco_ch3cn_9Single Crystal · Target Sample · Pristine FrameworkMicrocrystalline brown complex and light-brown X-ray blocks from acetonitrile solution of 6 and tetraazamacrocyclic ligand 2.p006 / article p.754 · Synthesis of compounds
colourless crystals of compound 1research_0314__mat__haco_1Single Crystal · Model System · ModelCrystals grown from an acetone-water mixture after acidification/extraction.p004 / article p.752 · Synthesis of compounds
0.001 M solution of compound 4 in DMSOresearch_0314__mat__nah_aco2_4Unknown · Model System · ModelDMSO solution prepared for conductance comparison.p011 / article p.759 · Solutions electrical conductivity of silver(I) complexes
0.001 M solution of compound 5 in DMSOresearch_0314__mat__cs_aco_5Unknown · Model System · ModelDMSO solution prepared for conductance comparison.p011 / article p.759 · Solutions electrical conductivity of silver(I) complexes