In spectrophotometry, substances that can absorb in the UV range are typically those that contain π electrons or non-bonding electrons (n-electrons) that can be excited by UV light. These include:

1. Conjugated systems: These are systems with alternating single and double bonds. The more extended the conjugation, the longer the wavelength (lower energy) of light absorbed. Examples include many organic compounds, such as benzene, and also complex molecules like chlorophyll and hemoglobin.

2. Aromatic compounds: These are a type of conjugated system where the π electrons are delocalized over a ring structure. Examples include benzene and naphthalene.

3. Carbonyl groups: The C=O bond in carbonyl groups can absorb UV light, so compounds containing this group, such as aldehydes, ketones, and carboxylic acids, can absorb in the UV range.

4. Certain inorganic ions: Some transition metal ions can absorb UV light due to electronic transitions within the d orbitals. Examples include copper(II) and iron(II) ions.

5. Certain rare earth ions: These can absorb UV light due to electronic transitions within the f orbitals.

Remember, the specific wavelengths absorbed by a substance will depend on its molecular structure and the energy levels of its electrons.

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In spectrophotometry, substances that can absorb in the UV range are typically those that contain π electrons or non-bonding electrons (n-electrons) that can be excited by UV light. These include:

1. Conjugated systems: These are systems with alternating single and double bonds. The more extended the conjugation, the longer the wavelength (lower energy) of light absorbed. Examples include many organic compounds, such as benzene, and also complex molecules like chlorophyll and hemoglobin.

2. Aromatic compounds: These are a type of conjugated system where the π electrons are delocalized over a ring structure. Examples include benzene and naphthalene.

3. Carbonyl groups: The C=O bond in carbonyl groups can absorb UV light, so compounds containing this group, such as aldehydes, ketones, and carboxylic acids, can absorb in the UV range.

4. Certain inorganic ions: Some transition metal ions can absorb UV light due to electronic transitions within the d orbitals. Examples include copper(II) and iron(II) ions.

5. Certain rare earth ions: These can absorb UV light due to electronic transitions within the f orbitals.

Remember, the specific wavelengths absorbed by a substance will depend on its molecular structure and the energy levels of its electrons.

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In spectrophotometry, substances that can absorb in the UV range are typically those that contain π electrons or non-bonding electrons (n-electrons) that can be excited by UV light. These include:

1. Conjugated systems: These are systems with alternating single and double bonds. The more extended the conjugation, the longer the wavelength (lower energy) of light absorbed. Examples include many organic compounds, such as benzene, and also complex molecules like chlorophyll and hemoglobin.

2. Aromatic compounds: These are a type of conjugated system where the π electrons are delocalized over a ring structure. Examples include benzene and naphthalene.

3. Carbonyl groups: The C=O bond in carbonyl groups can absorb UV light, so compounds containing this group, such as aldehydes, ketones, and carboxylic acids, can absorb in the UV range.

4. Certain inorganic ions: Some transition metal ions can absorb UV light due to electronic transitions within the d orbitals. Examples include copper(II) and iron(II) ions.

5. Certain rare earth ions: These can absorb UV light due to electronic transitions within the f orbitals.

Remember, the specific wavelengths absorbed by a substance will depend on its molecular structure and the energy levels of its electrons.

What kind of substances will absorb in UV range in spectrophotometryedit

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