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Potential energy or potential function plays an essential role in determining the stability of a mechanical system. If a system is subjected to both gravitational and elastic forces, the potential function of the system can be expressed as the algebraic sum of gravitational and elastic potential energy. If the system is in equilibrium and is displaced by a small amount, then the work done on the system equals the negative of the change in the system's potential energy from the initial to the...
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Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
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Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. Depending upon the number of atoms present in the ring, they can be either five or six-membered. Examples of five-membered heterocyclic aromatic compounds include pyrrole, furan, thiophene, and imidazole. Pyrrole consists of one nitrogen atom having one lone pair of electrons. Furan and thiophene have one oxygen and one sulfur heteroatom,...
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Preparation and Reactivity of Gasless Nanostructured Energetic Materials
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Purine-Based Fused Tetracyclic Energetic Materials with Balanced Energetic Performance.

Sagar Nehe1, Rishabh Gupta1, Vikas D Ghule2

  • 1Energetic Materials Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India.

Organic Letters
|February 24, 2026
PubMed
Summary
This summary is machine-generated.

Researchers synthesized novel purine-based energetic materials. These compounds show high energy density and good performance, making them promising for high-performance energetic materials (HEDMs).

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Area of Science:

  • Organic Chemistry
  • Materials Science
  • Energetic Materials

Background:

  • Purine scaffolds are known for their versatile chemical properties.
  • Energetic materials are crucial for various applications, demanding high performance and safety.
  • Fused tetracyclic systems offer rigid structures suitable for energetic material design.

Purpose of the Study:

  • To synthesize and characterize novel purine-based fused tetracyclic energetic materials.
  • To evaluate the energetic properties, thermal stability, and sensitivity of the synthesized compounds.
  • To identify promising candidates for high-density energetic materials (HEDMs).

Main Methods:

  • Synthesis of purine-based fused tetracyclic compounds.
  • Incorporation of explosophoric groups to enhance energetic properties.
  • Characterization using techniques to determine density, heat of formation, detonation performance, thermal stability, and mechanical sensitivity.

Main Results:

  • Successful synthesis of a series of purine-based fused tetracyclic energetic materials.
  • Compounds exhibited high densities (1.82-1.85 g cm-3) and high heats of formation (433.6-709.0 kJ mol-1).
  • Excellent detonation performance (VOD: 8200-8677 m s-1; DP: 27.5-32.2 GPa) and moderate to good thermal stability (Td = 187-207 °C) were observed.

Conclusions:

  • The synthesized purine-based compounds are promising candidates for high-density energetic materials (HEDMs).
  • Compounds 5, 6, and 9 demonstrated a favorable balance of performance, stability, and low sensitivity.
  • Further research into these materials could lead to advancements in energetic material applications.